Updated on 2024/02/08

写真a

 
YAMAMOTO TAKUYA
 
Organization
Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology Associate Professor
School of Engineering Department of Chemical Engineering
Title
Associate Professor
Affiliation
Institute of Engineering
Affiliation campus
Nakamozu Campus

Position

  • Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology 

    Associate Professor  2023.04 - Now

  • School of Engineering Department of Chemical Engineering 

    Associate Professor  2023.04 - Now

Degree

  • 博士(工学) ( Osaka University )

  • Ph.D. ( Osaka University )

  • 修士(工学) ( Osaka University )

  • 学士(工学) ( Osaka University )

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Transport phenomena and unit operations

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering

  • Nanotechnology/Materials / Metals production and resources production

Professional Memberships

  • 粉体工学会

    2023.10 - Now

  • 日本流体力学会

    2023.09 - Now

  • 資源素材学会

    2021.05 - Now

  • 日本金属学会

    2020.08 - 2022.12

  • Japan Society of Sonochemistry

    2018.08 - Now

  • THE IRON AND STEEL INSTITUTE OF JAPAN

    2017.07 - Now

  • THE JAPAN INSTITUTE OF LIGHT METALS

    2017.07 - Now

  • 日本伝熱学会

    2016.05 - 2019.03

  • 日本マイクログラビティ応用学会

    2016.04 - 2017.03

  • オープンCAE学会

    2012.12 - Now

  • THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN

    2012.06 - Now

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Committee Memberships (off-campus)

  • 編集委員   軽金属学会  

    2021.06 - Now 

  • 反応工学部会 ソノプロセス分科会 企画幹事   化学工学会  

    2021.04 - Now 

Awards

  • 論文審査貢献賞

    2023.08   化学工学会  

  • 研究奨励賞

    山本卓也

    2021.12   化学工学会  

  • 第61回原田研究奨励賞

    山本卓也

    2021.05   公益財団法人 本多記念会  

  • 第30回奨励賞

    山本卓也

    2020.06   日本金属学会  

  • トーキン財団奨励賞

    山本 卓也

    2020.01   トーキン科学技術振興財団  

  • Encouragement Prize

    YAMAMOTO Takuya

    2019.11   Japan Society of Sonochemistry  

  • Best poster award

    Takuya Yamamoto, Shin-ichi Hatanaka, Sergey Komarov

    2019.09   4th Asia-Oceania Sonochemical Society Conference  

  • Light Metal Encouragement Prize

    YAMAMOTO Takuya

    2019.07   The japan Institute of Light Metals  

  • Encouragement award

    YAMAMOTO Takuya

    2018.10   SCEJ Fluid and Particle Processing Division  

  • CEEC Best Presentation Award

    2015.03   CEEC  

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    Country:Japan

  • 大阪大学基礎工学研究科賞

    山本 卓也

    2014.03  

  • 毛利ポスターセッション賞

    2013.11   JASMAC-27  

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    Country:Japan

  • Modi Jaya-Jayant Award

    2013.06   ISTS-29  

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    Country:Japan

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Job Career (off-campus)

  • Japan Science and Technology Agency

    2022.10 - Now

  • Tohoku University   Graduate School of Engineering, Department of Metallurgy

    2020.04 - 2023.03

  • Tohoku university

    2017.04 - 2020.03

Papers

  • Mass transfer of chemical specie in acoustic cavitation bubble

    Takuya Yamamoto

    Chemical Engineering Science   (in press)   2024.01

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    Authorship:Lead author, Last author, Corresponding author   Publishing type:Research paper (scientific journal)  

  • Numerical and physical simulation of flux entrainment mechanism in mechanical stirring process Reviewed

    Takuya Yamamoto, Sergey Komarov

    Metallurgical and Materials Transactions B   54B   303 - 314   2023.01

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11663-022-02691-3

  • Enhancement and mechanism of Rhodamine B decomposition in cavitation-assisted plasma treatment combined with Fenton reactions Reviewed

    Yifan Xu, Sergey Komarov, Takuya Yamamoto, Takaaki Kutsuzawa

    Catalyst   12   1491   2022.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/catal12121491

  • Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys Invited Reviewed

    J. Sun, K. Higashi, S. Romankov, T. Yamamoto, S. Komarov

    Ultrasonics Sonochemistry   90   106209   2022.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2022.106209

  • Fabrication of CrSi2-containing master alloy for modification of Fe-containing intermetallic compounds in aluminum alloys Reviewed

    Jincheng Sun, Aiga Takahashi, Kennosuke Higashi, Takuya Yamamoto, Sergey Komarov

    Materials   15   7836   2022.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/ma15217836

  • Understanding the origin of low-energy operation characteristics for Cr2Ge2Te6 phase-change material: Enhancement of thermal efficiency in the high-scaled memory device Reviewed

    S. Hatayama, T. Yamamoto, S. Mori, Y.-H. Song, Y. Sutou

    ACS Appl. Mater. Interface   14 ( 39 )   44604 - 44613   2022.09

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.2c13189

  • Behavior of Al-Zr intermetallic compound particles under high-amplitude ultrasound irradiation into molten aluminum Reviewed

    Jincheng Sun, Takuya Yamamoto, Sergey Komarov

    Journal of Alloys and Compounds   912   165128 - 165128   2022.08( ISSN:0925-8388

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jallcom.2022.165128

  • Long-term experiment of hot spring heat recovery using rotary heat exchanger by controlling precipitation Reviewed

    N. Maruoka, T. Yamamoto, S. Endo, T. Aizawa, T. Ono, H. Sasaki, K. Oyama

    ISIJ International   62 ( 12 )   2529 - 2535   2022.08

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    Publishing type:Research paper (scientific journal)  

  • Effect of microstructural parameters on channel-type segregation formation in DC casting of Al-Mg billet Reviewed

    Takuya Yamamoto, Keisuke Kamiya, Takashi Kubo, Masanori Tsunekawa, Sergey V. Komarov

    JOM   74 ( 12 )   4864 - 4875   2022.08

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    Authorship:Lead author, Last author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11837-022-05440-8

  • High efficient impeller for rotary gas injection in aluminum melt Reviewed

    Takuya Yamamoto, Aire Suzuki, Sergey V. Komarov, Masaya Shigemitsu, Ryosuke Taniguchi, Yasuo Ishiwata

    Metallurgical and Materials Transactions B   53B   2587 - 2599   2022.05

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11663-022-02553-y

  • Design strategy of phase change material properties for low-energy memory application Invited Reviewed

    Takuya Yamamoto, Shogo Hatayama, Yuji Sutou

    Materials & Design   216   110560 - 110560   2022.04( ISSN:0264-1275

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    Aiming at reducing energy consumptions in data writing, the development of new memory materials is highly required. To develop new phase change materials (PCMs) with extremely low operation energy used in non-volatile memory, such as storage-class memory, we performed Bayesian optimization for the physical properties of PCMs through numerical simulations. In this numerical simulation, the electrical potential and temperature distribution were solved simultaneously. It was found that a PCM with low thermal conductivity, low melting temperature, and low ratio of contact resistance to volumetric resistance results in a low operation energy of a PCM-based memory application. Finally, we developed a design strategy for PCMs. New PCMs should be developed by lowering the operation energy E, described as E = κ(1 + C)ΔT/Δz, where κ is the thermal conductivity of the PCM, ΔT is the melting temperature, C is the ratio of contact resistance to the volumetric resistance, and Δz is the thickness of the PCM. The present results clarify the relationship between thermal and electrical properties for lowering operation energy ever hidden in previous studies. According to the design strategy, an operation energy in phase change memory application can be decreased to less than 1/100 compared with conventional Ge-Sb-Te compounds.

    DOI: 10.1016/j.matdes.2022.110560

  • Effect of gas injection on cavitation-assisted plasma treatment efficiency of waste water Reviewed

    Yifan Xu, Takuya Yamamoto, Daiki Hariu, Sergey Komarov

    Ultrasonics Sonochemistry   83   105941   2022.01

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2022.105941

  • Investigation on three-dimensional morphology of channel-type macrosegregation in DC cast Al-Mg billets through numerical simulation Reviewed

    Takuya Yamamoto, Keisuke Kamiya, Takashi Kubo, Masanori Tsunekawa, Sergey V. Komarov

    JOM   73 ( 12 )   3838 - 3847   2021.12( ISSN:1047-4838

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11837-021-04906-5

    Other URL: https://link.springer.com/article/10.1007/s11837-021-04906-5/fulltext.html

  • Numerical prediction of channel-type segregation formation in DC casting of Al-Mg billet Reviewed

    Takuya Yamamoto, Keisuke Kamiya, Keita Fukawa, Shohei Yomogida, Takashi Kubo, Masanori Tsunekawa, Sergey V. Komarov

    Metallurgical and Materials Transactions B   52 ( 6 )   4046 - 4060   2021.12( ISSN:1073-5615

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11663-021-02320-5

    Other URL: https://link.springer.com/article/10.1007/s11663-021-02320-5/fulltext.html

  • Influence of Thomson effect on amorphization in phase-change memory: Dimensional analysis based on Buckingham’s П theorem for Ge2Sb2Te5 Reviewed

    Takuya Yamamoto, Shogo Hatayama, Yun-Heub Song, Yuji Sutou

    Materials Research Express   8 ( 11 )   115902   2021.11

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    To evaluate the Thomson effect on the temperature increase in Ge2Sb2Te5 (GST)-based phase-change random access memory (PCRAM), we created new dimensionless numbers based on Buckingham's Pi theorem. The influence of the Thomson effect on the temperature increase depends on the dominant factor of electrical resistance in a PCRAM cell. When the effect is dominated by the volumetric resistance of the phase-change material (C = rho(c)/Delta(x)/sigma << O(1)), the dimensionless evaluation number is B = mu(T)sigma Delta phi/k, where rho(c) is the contact resistance, Delta x is the thickness of PCM, sigma and k are the electrical k and thermal conductivities, mu(T) is the Thomson coefficient, and Delta phi is the voltage. When the contact resistance cannot be ignored, the evaluation number is B/(1 + C). The characteristics of hexagonal-type crystalline GST in a PCRAM cell were numerically investigated using the defined dimensionless parameters. Although the contact resistance of GST exceeded the volumetric resistance across the temperature range, the ratio of contact resistance to the whole resistance reduced with increasing temperature. Moreover, increasing the temperature of GST enhanced the influence of the Thomson effect on the temperature distribution. At high temperatures, the Thomson effect suppressed the temperature increase by approximately 10%-20%.

    DOI: 10.1088/2053-1591/ac3953

  • Enhancement of oscillation amplitude of cavitation bubble due to acoustic wake effect in multibubble environment Reviewed

    Takuya Yamamoto, Sergey Komarov

    Ultrasonics Sonochemistry   78   105734 - 105734   2021.10( ISSN:1350-4177

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2021.105734

  • Physical modeling of rotary flux injection in an aluminum melting furnace Reviewed

    Takuya Yamamoto, Hanako Takahashi, Sergey V. Komarov, Masaya Shigemitsu, Ryosuke Taniguchi, Yasuo Ishiwata

    Metallurgical and Materials Transactions B   52B ( 5 )   3363 - 3372   2021.09( ISSN:1073-5615

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11663-021-02265-9

    Other URL: https://link.springer.com/article/10.1007/s11663-021-02265-9/fulltext.html

  • Influence of ultrasound irradiation on transient solidification characteristics in DC casting process: Numerical simulation and experimental verification Reviewed

    Takuya Yamamoto, Sergey Komarov

    Journal of Materials Processing Technology   294   117116 - 117116   2021.08( ISSN:0924-0136

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jmatprotec.2021.117116

  • Incorporation of powder particles into impeller-stirred liquid bath through vortex formation Invited Reviewed

    S. Komarov, T. Yamamoto, H. Arai

    Materials   14 ( 11 )   2710 - 2710   2021.05

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    The present study addresses the incorporation of fine particles into liquids via the creation of a large-scale swirling vortex on the liquid free surface using a rotary impeller positioned along the axis of a cylindrical vessel. Four types of particles are used in the experiments to investigate the incorporation efficiency of the particles into a water bath under different impeller rotation speeds. Additionally, the vortex characteristics are investigated numerically. The results reveal that two factors, namely the particle wettability and turbulent oscillations at the bottom part of vortex surface, play dominant roles in determining the particle incorporation behavior. Hydrophobic particles are incapable of being incorporated into the water bath under any of the conditions examined in the present study. Partly wettable particles are entrained into the water bath, with the efficiency increasing with the impeller rotation speed and particle size. This is because an increase in the impeller rotation speed causes vortex deformation, whereby its bottom part approaches the impeller blades where the turbulent surface oscillations reach maximum amplitudes. Another possible mechanism of particle incorporation is the effect of capillary increases of liquid into the spaces between particles, which accumulate on the bottom surface of the vortex.

    DOI: 10.3390/ma14112710

  • Optical and electrical properties of InxGa1-xSe mixed crystal grown from indium flux by the traveling heater method Reviewed

    Y. Sato, C. Tang, K. Watanabe, M. Nakajima, T. Yamamoto, N. Tezuka, T. Tanabe, Y. Oyama

    Journal of Electronic Materials   50 ( 5 )   2649 - 2655   2021.05( ISSN:0361-5235

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    InxGa1-xSe mixed crystals have been successfully grown from an indium flux by the traveling heater method at three growth temperatures. The thickness of the grown InxGa1-xSe mixed crystal perpendicular to (001) was more than 3 mm. The lattice constant, and optical and electrical properties of the InxGa1-xSe mixed crystals and undoped GaSe crystals were investigated and compared. The indium content of the InxGa1-xSe mixed crystals was observed to increase with decreasing growth temperature, while the lattice constant along the c-axis was observed to follow Vegard's law. It was confirmed that a bandgap of In0.020Ga0.980Se is narrower than that of undoped GaSe according to the photoluminescence (PL) spectra. Compared with undoped GaSe crystal, the carrier concentration p was decreased by the incorporation of indium (In0.020Ga0.980Se, p = 6.4 x 10(14) cm(-3) at 257 K; In0.037Ga0.963Se, p = 2.6 x 10(14) cm(-3) at 257 K). In addition, it was suggested that the dominant carrier scattering mechanism of high-indium-content crystals at low temperature is ionized impurity scattering.

    DOI: 10.1007/s11664-020-08689-4

  • Fabrication of Al-Bi Frozen Emulsion Alloys due to High-Intense Ultrasound Irradiation Invited Reviewed

    Sergey V. Komarov, Takuya Yamamoto, Jincheng Sun

    Journal of Alloys and Compounds   859   158231   2021.04

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jallcom.2020.158231

  • Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation Reviewed

    Takuya Yamamoto, Kazuki Kubo, Sergey V. Komarov

    Ultrasonics Sonochemistry   71   105381   2021.03

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    DOI: 10.1016/j.ultsonch.2020.105381

  • High-speed imaging of ultrasonic emulsification using a water-gallium system Reviewed

    Takuya Yamamoto, Ryo Matsutaka, Sergey V. Komarov

    Ultrasonics Sonochemistry   71   105387 - 105387   2021.03( ISSN:1350-4177

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2020.105387

  • Dynamic behavior of acoustic cavitation bubble originated from heterogeneous nucleation Reviewed

    Takuya Yamamoto, Sergey Komarov

    Journal of Applied Physics   128 ( 4 )   044702 - 044702   2020.07( ISSN:0021-8979

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0017175

  • Combined effect of acoustic cavitation and pulsed discharge plasma on wastewater treatment efficiency in a circulating reactor: A case study of Rhodamine B Reviewed

    Sergey Komarov, Takuya Yamamoto, Yu Fang, Daiki Hariu

    Ultrasonics Sonochemistry   68   105236 - 105236   2020.06( ISSN:1350-4177

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2020.105236

  • InxGa1-xSe mixed crystals grown from an In flux by the traveling heater method for THz wave generation Reviewed

    Y. Sato, C. Tang, K. Watanabe, J. Ohsaki, T. Yamamoto, T. Tanabe, Y. Oyama

    Journal of Physics Communications   4 ( 6 )   065007   2020.06( ISSN:2399-6528

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    The growth rate of crystalline GaSe from solution was increased by using indium as a solvent. The solubility and concentration gradient of Se were measured using differential scanning calorimetry (DSC). The Se solubility and the temperature coefficient of the solubility were respectively 15 times and 2.2 times greater in crystals grown from an In flux with GaSe at saturation compared with the case of Se dissolved in a Ga flux. In this study, we succeeded in growing InxGa1-xSe ingots from an In flux without the need for a seed crystal, and in increasing the growth rate of GaSe from solution. In addition, we used difference frequency generation to generate THz waves (with a frequency of 9.7 THz) in an InxGa1-xSe mixed crystal and investigated the relationship between the output energy of the THz radiation and the interaction length of the excitation light. The conversion efficiency of THz wave (9.7 THz) from the InxGa1-xSe mixed crystal with thickness of 860 mu m was 26 times greater than that of GaSe crystal with thickness 100 mu m grown from Ga solvent.

    DOI: 10.1088/2399-6528/ab983d

  • Evaluation of aluminum dross generation rate during mechanical stirring of aluminum through model experiment and numerical simulation Reviewed

    T. Yamamoto, K. Kato, S. V. Komarov, R. Taniguchi, Y. Ishiwata

    Metallurgical and Materials Transactions B   51B   1836 - 1846   2020.04

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    DOI: 10.1007/s11663-020-01842-8

  • Liquid jet directionality and droplet behavior during emulsification of two liquids due to acoustic cavitation Reviewed

    T. Yamamoto, S. Komarov

    Ultrasonics Sonochemistry   62   104874   2020.01

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2019.104874

  • Terahertz wave generation via difference frequency generation by using 2D InxGa1-xSe crystal grown from indium flux Reviewed

    Y. Sato, C. Tang, K. Watanabe, J. Ohsaki, T. Yamamoto, N. Tezuka, T. Tanabe, Y. Oyama

    Optics Express   28 ( 1 )   472 - 477   2020.01

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    We demonstrate the generation of THz waves (frequency 9.7 THz) using difference frequency generation in an InxGa1-xSe mixed crystal grown from In flux. The amount of indium and the lattice constant of the crystal were evaluated using electron micro probe analysis and X-ray diffraction, respectively. We believe that the Ga sites were substituted by In atoms in the InxGa1-xSe crystal because the In content, estimated according to the Vegard's law, was similar to that measured by EPMA. The maximum power of the generated THz wave was 39 pJ and the conversion efficiency was 1.7×10-5 J-1. This conversion efficiency was 28 times larger than that reported for undoped GaSe crystal.

    DOI: 10.1364/OE.28.000472

    PubMed

  • Development of a Numerical Model for Hydrogen Bubble Generation, Dynamics and Trapping during Solidification of Aluminum Alloys through Eulerian-Lagrangian Framework Reviewed

    T. Yamamoto, S. Komarov

    International Journal of Cast Metals Research   32   266 - 277   2019.11

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/13640461.2019.1690417

  • Investigation on the surface vortex formation during mechanical stirring with an axial-flow impeller used in an aluminum process Reviewed

    T. Yamamoto, W. Kato, S. V. Komarov, Y. Ishiwata

    Metallurgical and Materials Transactions B   50 ( 6 )   2547 - 2556   2019.10

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    DOI: 10.1007/s11663-019-01681-2

  • Role of acoustic streaming in formation of unsteady flow in billet sump during ultrasonic DC casting of aluminum alloys Reviewed

    S. Komarov, T. Yamamoto

    Materials   12 ( 21 )   3532   2019.10

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/ma12213532

  • Evaluation of mass transfer in an aluminum melting furnace stirred mechanically during flux treatment Reviewed

    K. Kato, T. Yamamoto, S. V. Komarov, R. Taniguchi, Y. Ishiwata

    Materials Transactions   60 ( 9 )   2008 - 2015   2019.08

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.M2019055

  • Fragmentation of cavitation bubble in ultrasound filed under small pressure amplitude Reviewed

    T. Yamamoto, S. Hatanaka, S. V. Komarov

    Ultrasonics Sonochemistry   58   104684   2019.07

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2019.104684

  • Single bubble fragmentation in a mechanically stirred liquid bath under trailing vortex conditions Reviewed

    T. Yamamoto, S. V. Komarov

    Chemical Engineering Science   207   1007 - 1016   2019.07

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ces.2019.07.019

  • The effect of crucible rotation and crucible size in top-seeded solution growth of single crystal silicon carbide Reviewed

    T. Horiuchi, L. Wang, A. Sekimoto, Y. Okano, T. Yamamoto, T. Ujihara, S. Dost

    Crystal Research and Technology   54 ( 5 )   1900014 - 1900014   2019.05( ISSN:0232-1300

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/crat.201900014

  • Acoustic Cavitation Assisted Plasma for Wastewater Treatment: Degradation of Rhodamine B in aqueous solution Reviewed

    Y. Fang, D. Hariu, T. Yamamoto, S. Komarov

    Ultrasonics Sonochemistry   52   318 - 325   2019.04

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ultsonch.2018.12.003

  • Numerical investigation of the effect of heating rate on InGaSb crystal growth under zero-gravity Reviewed

    X. Jin, A. Sekimoto, Y. Okano, T. Yamamoto, Y. Hayakawa, Y. Inatomi, S. Dost

    Microgravity Science and Technology   31 ( 4 )   377 - 380   2019.04( ISSN:0938-0108

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    Publishing type:Research paper (scientific journal)  

    In order to determine the optimum heating rate for the planned microgravity experiments on the International Space Station (ISS), axisymmetric 2D numerical simulations were performed under the zero-gravity condition to investigate the effect of heating rate on the dissolution process of the seed and feed crystals in a sandwich system of InGaSb. The simulation results showed that the dissolution lengths of the seed and feed crystals are strongly affected by heating rate. A higher heating rate leads to larger feed and seed dissolutions. Simulation results suggest that the microgravity experiments on the ISS should not adopt a heating rate higher than 3.6 K/h in order to avoid a complete dissolution of the feed and/or seed crystals in this sandwich system.

    DOI: 10.1007/s12217-019-9698-x

  • Surface vortex formation and free surface deformation in an unbaffled vessel stirred by on-axis and eccentric impellers Reviewed

    T. Yamamoto, Y. Fang, S. V. Komarov

    Chemical Engineering Journal   367   25 - 36   2019.02

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    DOI: 10.1016/j.cej.2019.02.130

  • Mechanism of small bubble breakup in an unbaffled stirred vessel Reviewed

    T. Yamamoto, Y. Fang, S. Komarov

    Chemical Engineering Science   197   26 - 36   2019.01

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    DOI: 10.1016/j.ces.2018.12.007

  • Cavitation and acoustic streaming generated by different sonotrode tips Reviewed

    Yu Fang, Takuya Yamamoto, Sergey Komarov

    Ultrasonics Sonochemistry   48   79 - 87   2018.11( ISSN:1873-2828

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    Aiming at improving the efficiency of cavitation treatment, this work investigates characteristics of acoustic streaming and cavitation generated in water by dumbbell-shaped sonotrodes with plane, truncated and conical tips. The main emphasis was placed on elucidating the effects of tip shape and vibration amplitude ranged from 40 to 60 μm. The PIV technique and Weissler reaction were used to measure flow pattern and velocity of acoustic streaming, and cavitation efficiency, respectively. To provide a theoretical explanation to the experimental results, a self-developed mathematical model was used to simulate the acoustic streaming and predict the size of cavitation zone numerically. Both the experimental and numerical results revealed that the sonotrode tip shape affects the acoustic streaming significantly, altering the flow magnitude and direction from fast and downward under the plane and truncated tips to relatively slow and upward near the conical tip. Besides, the conical tip provides a more efficient cavitation treatment in comparison with the plane and truncated tips. The simulation results showed that widening of cavitation zone and altering of acoustic streaming velocity and direction near the sonotrode tip are responsible for the enhancement of cavitation treatment efficiency.

    DOI: 10.1016/j.ultsonch.2018.05.011

  • Investigation of impeller design and flow structures in mechanical stirring of molten aluminum Reviewed

    Takuya Yamamoto, Aire Suzuki, Sergey V. Komarov, Yasuo Ishiwata

    Journal of Materials Processing Technology   261   164 - 172   2018.11( ISSN:0924-0136

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    This study investigated the flow characteristics of aluminum melt agitated by differently shaped impellers. A typical impeller used in the aluminum industry has twisted blades. The present study examined the effect of twisting angle on the flow pattern through PIV experiments and numerical simulation using water model. The results revealed that the twisting angle affects the strength and direction of discharge flow. The strength of discharge flow became weaker with increasing the twisting angle while the flow direction was influenced by both the front blade surface of impeller and space interval between the adjacent blades. The structure of trailing vortices was found to be also varied depending on the impeller twisting angle.

    DOI: 10.1016/j.jmatprotec.2018.06.012

  • Investigation of melt stirring in aluminum melting furnace through Water model Reviewed

    Takuya Yamamoto, Kenya Kato, Sergey V. Komarov, Yasunori Ueno, Masaaki Hayashi, Yasuo Ishiwata

    Journal of Materials Processing Technology   259   409 - 415   2018.09( ISSN:0924-0136

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    In the present study, an optimized low-cost numerical model has been developed to simulate melt stirring and mass transfer in aluminum melting furnace. To validate the numerical model, scaled-down water model experiments were also conducted. The present numerical results revealed good agreement with the experimental observations. Faster speeds of impeller rotation could improve the stirring efficiency
    however, a strong surface vortex was formed at the free surface under these conditions. The perfect mixing time was the longest at middle immersion depth of impeller and the strong surface vortex was generated at the largest immersion depth. The mechanism of surface vortex generation was explained in terms of pressure distribution around the blades, which is created by the impeller rotation.

    DOI: 10.1016/j.jmatprotec.2018.04.025

  • Generation of OH Radical by Ultrasonic Irradiation in Batch and Circulatory Reactor Reviewed

    Yu Fang, Sayaka Shimizu, Takuya Yamamoto, Sergey Komarov

    IOP Conference Series: Earth and Environmental Science   120 ( 1 )   012019   2018.03( ISSN:1755-1315

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    Publishing type:Research paper (international conference proceedings)  

    Ultrasonic technology has been widely investigated in the past as one of the advance oxidation processes to treat wastewater, in this process acoustic cavitation causes generation of OH radical, which play a vital role in improving the treatment efficiency. In this study, OH radical formation rate was measured in batch and circulatory reactor by using Weissler reaction at various ultrasound output power. It is found that the generation rate in batch reactor is higher than that in circulatory reactor at the same output power. The generation rate tended to be slower when output power exceeds 137W. The optimum condition for circulatory reactor was found to be 137W output and 4L/min flow rate. Results of aluminum foil erosion test revealed a strong dependence of cavitation zone length on the ultrasound output power. This is assumed to be one of the reasons why the generation rate of HO radicals becomes slower at higher output power in circulatory reactor.

    DOI: 10.1088/1755-1315/120/1/012019

  • Numerical investigation for the movement of cell colonies in bioreactors: Stirring and orbital shaking tanks Reviewed

    Takuya Yamamoto, Masaki Yano, Yasunori Okano, Masahiro Kino-Oka

    Journal of Chemical Engineering of Japan   51 ( 5 )   423 - 430   2018( ISSN:0021-9592

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)  

    A numerical simulation study was carried out to investigate the suspension of cell colonies in bioreactors of stirring and orbiting shaking tanks. The cell colonies in a culture liquid were modeled as rigid spherical solid particles. The shear stresses acting on these particles were analyzed. The simulation results have shown that the maximum shear stress acting on the particles in the stirring tank is higher than that on the particles in the orbital shaking tank. However, the average values of the shear stress on the particles in both tanks are comparable. The simulation results also show that more particles accumulate at the bottom of the orbital shaking tank in which the particle aggregation obeys the Einstein's tea leaf paradox. The simulation results are evaluated based on the predicted shear stress profiles and tank configuration.

    DOI: 10.1252/jcej.17we112

  • Numerical investigation of the nano-scale solutal Marangoni convections Reviewed

    Y. Imai, T. Yamamoto, A. Sekimoto, Y. Okano, R. Sato, Y. Shigeta

    Journal of the Taiwan Institute of Chemical Engineers   98   20 - 26   2018( ISSN:1876-1070

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    Marangoni convection driven by surface tension gradient plays an important role in nano-scale processes and also the processes under microgravity in space, where the effect of surface tension may become significant compared with that of the gravitational body force. For a better understanding of Marangoni convection occurring in a nano-scale process, Molecular Dynamics (MD) and Computational Fluid Dynamics (CFD) simulations were carried out for a thin liquid film with concentration gradient. The computed flow structures by these methods were compared. The results show quantitative differences in the magnitudes of the flow velocity and the deformation of the liquid film. It was also found that a stronger driving force would be needed to generate nano-scale flows compared with that required for macro-scale flows. This is due to the fact that a stronger surface force may be needed to overcome the random movements of molecules.

    DOI: 10.1016/j.jtice.2018.05.015

  • Numerical investigation of the transport phenomena occurring in the growth of SiC by the induction heating TSSG method Reviewed

    Takuya Yamamoto, Nikhil Adkar, Yasunori Okano, Toru Ujihara, Sadik Dost

    JOURNAL OF CRYSTAL GROWTH   474 ( 15 )   50 - 54   2017.09( ISSN:0022-0248

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    A numerical simulation study was carried out to examine the transport phenomena occurring during the Top-Seeded Solution Growth (TSSG) process of SiC. The simulation model includes the contributions of radiative and conductive heat transfer in the furnace, mass transfer and fluid flow in the melt, and the induced electric and magnetic fields. Results show that the induced Lorentz force is dominant in the melt compared with that of buoyancy. At the relatively low coil frequencies, the effect of the Lorentz force on the melt flow is significant, and the corresponding flow patterns loose their axisymmetry and become almost fully disturbed. However, at the relatively higher frequency values, the flow is steady and the flow patterns remain axisymmetric.

    DOI: 10.1016/j.jcrysgro.2016.12.086

  • Global simulation of the induction heating TSSG process of SiC for the effects of Marangoni convection, free surface deformation and seed rotation Reviewed

    Takuya Yamamoto, Yasunori Okano, Toru Ujihara, Sadik Dost

    JOURNAL OF CRYSTAL GROWTH   470   75 - 88   2017.07( ISSN:0022-0248

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    A global numerical simulation was performed for the induction heating Top-Seeded Solution Growth (TSSG) process of SiC. Analysis included the furnace and growth melt. The effects of interfacial force due to free surface tension gradient, the RF coil-induced electromagnetic body force, buoyancy, melt free surface deformation, and seed rotation were examined. The simulation results showed that the contributions of free surface tension gradient and the electromagnetic body force to the melt flow are significant. Marangoni convection affects the growth process adversely by making the melt flow downward in the region under the seed crystal. This downward flow reduces carbon flux into the seed and consequently lowers growth rate. The effects of free surface deformation and seed rotation, although positive, are not so significant compared with those of free surface tension gradient and the electromagnetic body force. Due to the small size of the melt the contribution of buoyancy is also small. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jcrysgro.2017.04.016

  • A numerical study on the dissolution process of InGaSb under zero gravity Reviewed

    X. Jin, T. Yamamoto, Y. Takagi, Y. Okano, Y. Inatomi, Y. Hayakawa, S. Dost

    International Journal of Microgravity Science and Applications   34 ( 2 )   340206   2017.04( ISSN:0915-3616

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    InxGa1-xSb bulk crystals have been grown on the International Space Station using a GaSb (feed) / InSb / GaSb (seed) sandwich -structured sample. In order to gain a deeper insight into the transport phenomenon and the relevant fundamental mechanisms during the dissolution process of InGaSb in this system, four numerical simulations with different temperature conditions and under the assumption of zero gravity were performed by the volume -averaging continuum model. Simulation results showed the heat loss through the bottom wall did not affect the final feed/seed dissolution lengths and the grown crystal interface shape. The final dissolution lengths of the feed and seed crystals were determined by the temperature calculated along the seed interface. The results also indicate that the actual temperature of the growth ampoule should be around 3K lower than that measured on the outside the protective cartridge.

    DOI: 10.15011//jasma.34.340206

  • Numerical study of fluid dynamics in suspension culture of ips cells

    Yano M, Yamamoto T, Okano Y, Kanamori T, Kino–Oka M

    ASEAN Journal of Chemical Engineering   17 ( 1 )   73 - 81   2017.01( ISSN:1655-4418

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    Publishing type:Research paper (scientific journal)  

    © 2018, Gadjah Mada University. All rights reserved. In a suspension culture of iPS cells, the shear stress generated during mixing is expected to promote differentiation of induced pluripotent stem (iPS) cells. The stress on the cells can be controlled by rotational rate and shape of impeller. However, it is difficult to optimize these operative parameters by experiments. Therefore, we have developed a numerical model to obtain the average and the maximum shear stress in two kinds of stirred tanks and an orbital shaking cylindrical container. The present results showed that the shear stress strongly depended on the type of mixing and lesser extent on the shape of the impeller. The average shear stress is larger in the shaking mode than that in the stirring mode. In contrast, the maximum shear stress is much smaller in the shaking than the stirring. These results suggest that stirring and shaking should be selectively used depending on the application.

  • Validation of the S-CLSVOF method with the density-scaled balanced continuum surface force model in multiphase systems coupled with thermocapillary flows Reviewed

    Takuya Yamamoto, Yasunori Okano, Sadik Dost

    INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS   83 ( 3 )   223 - 244   2017.01( ISSN:0271-2091

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    Three numerical methods, namely, volume of fluid (VOF), simple coupled volume of fluid with level set (S-CLSVOF), and S-CLSVOF with the density-scaled balanced continuum surface force (CSF) model, have been incorporated into OpenFOAM source code and were validated for their accuracy for three cases: (i) an isothermal static case, (ii) isothermal dynamic cases, and (iii) non-isothermal dynamic cases with thermocapillary flow including dynamic interface deformation. Results have shown that the S-CLSVOF method gives accurate results in the test cases with mild computation conditions, and the S-CLSVOF technique with the density-scaled balanced CSF model leads to accurate results in the cases of large interface deformations and large density and viscosity ratios. These show that these high accuracy methods would be appropriate to obtain accurate predictions in multiphase flow systems with thermocapillary flows. Copyright (c) 2016 John Wiley & Sons, Ltd.

    DOI: 10.1002/fld.4267

  • Molecular dynamics simulation of the nanoscale solutal marangoni convection Invited Reviewed

    Yosuke Imai, Takuya Yamamoto, Yasunori Okano, Ryuma Sato, Yasuteru Shigeta

    ASEAN Journal of Chemical Engineering   17 ( 1 )   29 - 36   2017( ISSN:1655-4418

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    © 2018, Gadjah Mada University. All rights reserved. Non-equilibrium molecular dynamics simulations for the 2- and 3-phase systems were performed to investigate the flow with two free surfaces in a nanoscale, where solute, water, and argon were assigned as each phase. We observed that the behaviors of some 3-phase systems significantly differ from those of 2-phase systems. In all 2-phase systems, the solutes just diffused into the water phase. On the other hand, the solutes were transferred along the liquid-gas interfaces in the case of 3-phase systems with a large surface tension gradient. These results indicated that solutal Marangoni convection existed even in the nano-scale and it affected mass transfer greatly.

  • Numerical simulation of InGaSb crystal growth onboard the International Space Station Invited Reviewed

    JIN Xin, YAMAMOTO Takuya, TAKAGI Youhei, OKANO Yasunori, INATOMI Yuko, HAYAKAWA Yasuhiro

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   64 ( 0 )   OS7 - 5   2017

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    <p>InGaSb crystals have been grown on the International Space Station using a GaSb (feed) / InSb / GaSb (seed) sandwich-structured sample. To shed light on the experimental results, numerical simulations were carried out to investigate the transport phenomena and mechanisms during the dissolution process of InGaSb crystal under zero-gravity. Simulation results showed that the dissolution lengths of feed and seed crystals were determined by the temperature along the seed interface. The results also indicate a 3 K temperature difference between the inside growth ampoule and the outside cartridge.</p>

    DOI: 10.11345/japannctam.64.0_OS7-05

    CiNii Article

  • Numerical investigation of oscillatory thermocapillary flows under zero gravity in a circular liquid film with concave free surfaces Reviewed

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    PHYSICS OF FLUIDS   28 ( 3 )   032106   2016.03( ISSN:1070-6631

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    NASA astronaut Pettit has conducted thermocapillary flow experiments in water films suspended in a solid ring onboard the International Space Station (ISS) in 2003 and 2011. In one of these experiments, an oscillatory thermocapillary flow was observed. The developed flow broke its symmetry along the centerline of the film. To the best of our knowledge, there are no studies on such oscillatory thermocapillary flows in thin films, and the flow-mechanism giving rise to such oscillatory flows is also not well understood. In order to shed light on the subject, we have carried out a numerical simulation study. The simulation results have shown that the water film geometry (film surface shape; being concave) is an important parameter and give rise to three oscillatory flow structures in the film, namely, a hydrothermal wave developing near the heated section, a symmetric oscillatory flow due to temperature variations, and a symmetry breaking flow due to the hydrodynamic instability along the free boundary layer (mixing layer) and the development of the hydrothermal waves. Simulation results show that the symmetry-breaking phenomenon observed in the thin film experiment on the ISS can be explained by the hydrodynamic instability and the development of hydrothermal waves. (C) 2016 AIP Publishing LLC.

    DOI: 10.1063/1.4943246

  • Numerical Simulation of InGaSb Crystals Growth under Microgravity Onboard the International Space Station Reviewed

    Jin Xin, Haryo Mirsandi, Takuya Yamamoto, Youhei Takagi, Yasunori Okano, Yuko Inatomi, Yasuhiro Hayakawa, Sadik Dost

    JJAP Conference Proceedings   4   011107-1 - 011107-7   2016.01

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    Publishing type:Research paper (international conference proceedings)   International / domestic magazine:International journal  

    InxGa1−xSb bulk crystal was grown using a GaSb (seed)/InSb/GaSb (feed) sandwich-structured system onboard the International Space Station (ISS). In order to investigate the transport phenomena especially in terms of interface shapes and dissolution heights, the dissolution process was simulated under a micro-gravity level of the ISS. Simulation results showed that the seed/melt interface was concave towards the seed due to the temperature distribution of the system. This prediction is in good agreement with the results of our previous experimental study.

    DOI: 10.7567/JJAPCP.4.011107

  • Development of a numerical model for Marangoni convection in the micro-scale environment Reviewed

    Takuya Yamamoto, Yasunori Okano, Sadik Dost

    JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY   11 ( 3 )   JTST0036   2016( ISSN:1880-5566

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    Marangoni convection is induced in liquids by surface tension gradient along a free surface. Such flows also develop in nano- and micro-scale systems and play important roles. To have a better understanding for the phenomena occurring in processing of such micro-scale systems, generally two kinds of numerical simulation approaches have been considered: continuum and discrete (molecular dynamics). While the continuum-based techniques cannot capture the intermolecular effects, the molecular dynamics approach requires huge computational cost. To address the adverse futures of these techniques, a new numerical method has been developed by combining the computational fluid dynamics (CFD) from the continuum side and Langevin dynamics from the discrete approach. The present simulation results have shown that this new numerical technique can successfully study and predict the phenomena occurring in macro-scale process applications.

    DOI: 10.1299/jtst.2016jtst0036

  • Numerical simulation of the effect of free surface shape on Marangoni convection in a liquid film sustained in a circular ring with different Prandtl numbers Reviewed

    N. Adkar, T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    International Journal of Microgravity Science and Application   33   330309   2016

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    DOI: 10.15011/jasma.33.330309

  • Numerical simulation model by volume averaging for the dissolution process of GaSb into InSb in a sandwich system Reviewed

    Takuya Yamamoto, Haryo Mirsandi, Xin Jin, Youhei Takagi, Yasunori Okano, Yuko Inatomi, Yasuhiro Hayakawa, Sadik Dost

    NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS   70 ( 5 )   441 - 458   2016( ISSN:1040-7790

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    The volume-averaging continuum technique has been utilized to obtain numerical predictions for the transport phenomena occurring during the dissolution process of GaSb into InSb melt in a sandwich system. Dissolution and subsequent growth in this system are achieved by the application of a temperature gradient. The developed model was first verified for two test cases [(i) fluid/solid conjugate heat transfer and (ii) the solidification process of the binary system]. The code was then utilized to simulate the dissolution process of GaSb into InSb in the GaSb/InSb/GaSb sandwich system. The present results show that the developed volume-averaging model provides accurate predictions.

    DOI: 10.1080/10407790.2016.1230397

  • A Numerical Study on the Growth Process of InGaSb Crystals Under Microgravity with Interfacial Kinetics Reviewed

    H. Mirsandi, T. Yamamoto, Y. Takagi, Y. Okano, Y. Inatomi, Y. Hayakawa, S. Dost

    MICROGRAVITY SCIENCE AND TECHNOLOGY   27 ( 5 )   313 - 320   2015.09( ISSN:0938-0108

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    InxGa1-xSb bulk crystals are to be grown using a GaSb(seed)/InSb/GaSb(feed) sandwich-structured sample onboard the International Space Station (ISS). The InGaSb crystals will be grown on top of GaSb seed single crystals with different orientations viz., (111)A, (111)B, (110), (100) in order to examine and understand the growth kinetics of the crystals. In the present work, a numerical model of the crystal growth system has been developed to investigate the interface kinetics effects on the growth process by taking kinetics coefficient into account. The proposed numerical model was applied to evaluate the effect of crystal orientation on growth rate. Simulation results showed that the kinetics coefficient, whose value depends on crystal orientation, affected the growth rate of InGaSb crystal and the dissolution rate of GaSb feed crystal in the sandwich system.

    DOI: 10.1007/s12217-015-9417-1

  • Numerical Investigation of the Effect of Free Surface Shape on the Direction of Thermocapillary Flow in a Thin Circular Pool Reviewed

    Takuya Yamamoto, Youhei Takagi, Yasunori Okano, Sadik Dost

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   48 ( 6 )   407 - 417   2015.06( ISSN:0021-9592

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    A numerical study of a thermocapillary flow in a thin circular pool under zero and normal gravity conditions was carried out to investigate the effect of free surface shape on flow direction. We have previously reported that the direction of a thermocapillary flow in a circular water film under zero gravity was dependent on the shape of the film. In the present study, we also found that the direction of the thermocapillary flow in a water pool is dependent on free surface shape even under normal gravity. This finding shows that we can control the direction of the flow in the pool by changing its free surface shape by varying the volume ratio of the pool.

    DOI: 10.1252/jcej.14we141

  • A three-dimensional simulation of thermocapillary flow in a circular thin liquid film under zero gravity Reviewed

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan   12   Pe_19 - Pe_27   2014

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    DOI: 10.2322/tastj.12.Pe_19

  • A numerical investigation of the influence of interface kinetics during the growth process of InGaSb crystal under microgravity field Invited Reviewed

    Mirsandi Haryo, Yamamoto Takuya, Takagi Youhei, Okano Yasunori, Inatomi Yuko, Hayakawa Yasuhiro

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   63 ( 0 )   33 - 33   2014

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    InGaSb is a promising material for electronic devices. However, it is difficult to grow high quality homogeneous InGaSb crystals on Earth due to gravitational segregation. This adverse effect is minimized in the microgravity environment due to the suppression of convection. We have conducted experiment on board the ISS to understand the underlying physics that play role in the growth of high-quality semiconductor crystals. In the present study, we investigated the influence of interface kinetics during the growth process by using numerical simulation. Numerical results showed that the kinetic coefficient affected the growth rate of InGaSb crystal and the dissolution rate of GaSb crystal.

    DOI: 10.11345/japannctam.63.0_33

    CiNii Article

  • Numerical investigation for the effect of the liquid film volume on thermocapillary flow direction in a thin circular liquid film Reviewed

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    PHYSICS OF FLUIDS   25 ( 8 )   082108   2013.08( ISSN:1070-6631

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    NASA Astronaut Dr. Pettit carried out a thermocapillary flow experiment onboard the International Space Station in 2003. In this experiment a thin water film containing milk powder was formed in a stainless-steel wire ring. Heating a section of the ring by a soldering iron induced in the water film a thermocapillary flow towards the heated section of the ring (outward flow: cold to hot). This flow was in the opposite direction of the usually observed thermocapillary flows (inward flow: hot to cold). To shed light on this interesting phenomenon observed in the space experiment, we have conducted a three-dimensional numerical simulation study. Simulation results showed that the film geometry of the water film is a key factor determining flow direction and flow strength. When the liquid film free surfaces are convex, i.e., the water film volume is larger than that when the free surfaces are flat, an outward flow develops in the film as observed in the space experiment. However, when the free surfaces are concave, the simulation predicts an inward flow. (C) 2013 AIP Publishing LLC.

    DOI: 10.1063/1.4818160

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Books and Other Publications

  • Numerical analysis of channel-type segregations in DC casting aluminum slab

    Keisuke Kamiya, Takuya Yamamoto( Role: Joint author ,  989-996)

    Light Metals 2023  2023.03 

  • 攪拌技術とスケールアップ、シミュレーションの活用

    山本卓也, komarov sergey( Role: Contributor ,  第9節 攪拌時に生成する表面渦形成と気泡分裂挙動に対する数値シミュレーション)

    技術情報協会  2021.11 

  • Development and application of large-sized sonotrode systems for ultrasonic treatment of molten aluminum alloys

    S. Komarov, T. Yamamoto( Role: Contributor ,  1597-1604)

    Light Metals 2019, The Minerals, Metals and Materials Series  2019.03 

  • Investigation on acoustic streaming during ultrasonic irradiation in aluminum melts

    T. Yamamoto, S. Komarov( Role: Contributor ,  1527-1531)

    Light Metals 2019, The Minerals, Metals and Materials Series  2019.03 

MISC

  • 超音波プロセス内の界面移動現象 ―基礎現象解明からプロセス設計指針構築に繋げるために― Invited

    山本卓也

    化学工学会東北支部ニュースレター   121   16 - 22   2023.04

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  • 超音波キャビテーションマルチバブル動力学の探索

    山本卓也

    京都大学学術情報メディアセンター 全国共通利用版[広報]   21 ( 1 )   18 - 19   2022.12

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  • 機械攪拌中浮遊油膜巻き込みメカニズムの解明

    山本卓也

    京都大学学術情報メディアセンター・センター全国共通[広報]   20 ( 1 )   2 - 3   2021.11

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    Authorship:Lead author, Last author, Corresponding author   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

  • 伝熱面を機械的に更新する、熱交換技術 Invited

    丸岡伸洋, 山本卓也, 小野寿光, 遠藤聡, 佐々木裕, 高島正, 小山克博, 前田圭一郎

    クリーンエネルギー   30 ( 9 )   22 - 28   2021.09

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  • Numerical simulation in ultrasonic treatment: Cavitation bubble dynamics and acoustic streaming Invited

    Takuya Yamamoto, Komarov Sergey

    Chemical Industry   72 ( 7 )   454 - 459   2021.07

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  • Utilization of OpenFOAM in an Aluminum Making Process Invited

    Takuya Yamamoto, Sergey Komarov

    DEN-NETSU   60 ( July )   34 - 39   2021.07

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  • 回転円筒による高効率熱交換技術 ー伝熱面への無機マテリアル生成による伝熱性能低下を抑制ー Invited

    丸岡伸洋, 小野寿光, 遠藤聡, 相澤直信, 山本卓也, 佐々木裕, 高島正, 小山克博, 前田圭一郎

    Journal of the Society of Inorganic Materials, Japan   28   215 - 218   2021.07

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    Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

  • Development of Technologies for Reduction of Environmental Impact in Aluminum Melt Treatment Invited

    Takuya Yamamoto

    Materia Japan   60 ( 6 )   347 - 350   2021.06( ISSN:1340-2625 ( eISSN:1884-5843

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    DOI: 10.2320/materia.60.347

  • 液体攪拌操作における翼端渦と多相分散の関係性の解明

    山本卓也

    京都大学学術情報メディアセンター 広報   19 ( 1 )   2 - 3   2020.11

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  • 超音波キャビテーション気泡の分裂、崩壊、合一メカニズムの解明

    山本卓也

    東京大学情報基盤センター Supercomputing News   22 ( Special Issue 1 )   25 - 29   2020.09

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  • 物理的作用を利用した環境調和型アルミニウム生産プロセスの開発

    コマロフセルゲイ, 山本卓也

    軽金属   70 ( 7 )   318 - 319   2020.07

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  • 金属生産分野における移動現象論

    山本卓也

    化学工学会誌   84 ( 5 )   255   2020.05

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  • 奨励賞受賞者からの解説論文 圧縮性3相流シミュレーションによるエマルジョン化時に発生する高速液体ジェット方向依存性

    山本卓也

    ソノケミストリー学会ニュースレター   14   32 - 35   2020.02

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  • 機械撹拌操作時気泡巻き込みに対する数値解析

    山本卓也

    京都大学学術情報メディアセンター・センター全国共通[広報]   18 ( 1 )   2 - 3   2019.12

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    Authorship:Lead author   Publishing type:Article, review, commentary, editorial, etc. (other)  

  • 溶融金属への気泡吹き込みを伴う大規模機械撹拌時の流動と微細気泡 ダイナミクスの解明

    山本卓也

    東京大学情報基盤センター Supercomputing News   21 ( Special Issue 1 )   32 - 36   2019.03

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    Authorship:Lead author   Publishing type:Article, review, commentary, editorial, etc. (other)  

  • 数値解析を用いた国際宇宙ステーション内InGaSb結晶成長条件の設定と拡散係数の算出 Invited Reviewed

    岡野泰則, XIN Jin, 山本卓也, 関本敦, 早川泰弘, 稲富裕光

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   66th   2019

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  • OpenFOAMの最近の研究動向と化学工学分野への適用事例

    山本卓也

    化学工学会誌   82 ( 12 )   725   2018.12

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    Authorship:Lead author, Corresponding author   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  • 気液混相撹拌操作に対する数値解析

    山本卓也

    京都大学学術情報メディアセンター・センター全国共通[広報]   17 ( 1 )   10 - 11   2018.12

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    Authorship:Lead author   Publishing type:Article, review, commentary, editorial, etc. (other)  

  • Numerical investigation on transport phenomena during mechanical stirring of aluminum melt Invited Reviewed

    YAMAMOTO Takuya, KOMAROV Sergey

    Journal of The Japan Institute of Light Metals   68 ( 12 )   677 - 684   2018.12

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    Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    DOI: 10.2464/jilm.68.677

  • Numerical investigations of transport phenomena in chemical engineering process Invited

    Yasunori Okano, Takuya Yamamoto

    Journal of the Society of Powder Technology, Japan   55 ( 3 )   132 - 137   2018( ISSN:1883-7239

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    Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    Recent results on a numerical simulation of fluid dynamics, heat and mass transfer during SiC crystal growth by TSSG method are introduced as an example of chemical engineering process. It was found that Marangoni convection is dominant in the liquid phase and the three-dimentional numerical simulation result well explains the fluid flow in a water film suspended in a ring wire under the microgravity condition.

    DOI: 10.4164/sptj.55.132

  • 国際宇宙ステーション内InGaSb結晶成長に関する数値解析 Invited Reviewed

    岡野泰則, 岡野泰則, 岡野泰則, XIN Jin, 山本卓也, 高木洋平, 早川泰弘, 稲富裕光

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   63rd   2016

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  • 微小重力環境下におけるInGaSb凝固に関する数値解析 Invited Reviewed

    岡野泰則, 岡野泰則, 岡野泰則, JIN Xin, 山本卓也, 高木洋平, 早川泰弘, 稲富裕光

    日本伝熱シンポジウム講演論文集(CD-ROM)   53rd   2016( ISSN:1346-1532

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  • B111 Numerical investigation for Marangoni convection in a micro-scale field Invited Reviewed

    Yamamoto Takuya, Okano Yasunori

    Procee[d]ings of Thermal Engineering Conference   2015   "B111 - 1"-"B111-2"   2015.10

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    Marangoni convection becomes dominant under microgravity and micro-scale environments. In the micro-scale environment, the theory of macro-scale transport phenomena including fluid flow, heat and mass transfer can not be maintained. In addition, Marangoni convection with concentration gradient of surfactant is very difficult problem to analyze. To analyze mass transfer of some surfactants, we have to consider adhesion of surfactant to the interface, interaction between surfactants and macro-scale mass transfer. In this study, a numerical model for calculating the micro-scale phenomena has been developed. Multiphase simulation model including heat and mass transfer was developed and coupled with Discrete Element Method to analyze micro-scale mass transfer.

    CiNii Article

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Presentations

  • 音響バブルの運動とそれに伴う乳化現象 Invited

    山本卓也

    2023年第1回「ソフト粒子・界面研究会」  2023.12 

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    Presentation type:Oral presentation (general)  

  • Numerical investigation on mass transfer across the gas-liquid interface of single acoustic cavitation bubble

    2023.12 

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    Presentation type:Oral presentation (general)  

  • ソノプロセスにおけるファインバブルの動力学の解明 Invited

    山本卓也

    第37回LBM研究会  2023.11 

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    Presentation type:Oral presentation (general)  

  • Investigation on mass transfer across the gas-liquid interface around acoustic cavitation

    Takuya YAMAMOTO

    2023.09 

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    Presentation type:Oral presentation (general)  

  • ソノプロセスにおける液滴分散とミキシング Invited

    山本卓也

    化学工学会粒子・流体プロセス部会 ミキシング技術分科会 夏期セミナー“最新の乳化、分散技術”  2023.08 

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    Presentation type:Oral presentation (general)  

  • SimScaleのsolverに活用されているOpenFOAMの研究活用事例紹介 Invited

    山本卓也

    SimScale日本向けサービス開始記念セミナー  2023.07 

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    Presentation type:Oral presentation (invited, special)  

  • 熱物質輸送を伴う相変化現象による縞模様形成とその発生条件の特定 Invited

    山本卓也

    日本機械学会 熱工学部門 相変化界面研究会  2023.07 

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    Presentation type:Oral presentation (general)  

  • 金属溶湯処理装置、金属溶湯処理方法 Invited

    山本卓也

    JOGMEC 新技術・成果普及セミナー  2023.02 

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    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  • Optimization of phase change material properties and memory device through numerical simulation and Bayesian optimization Invited

    Takuya Yamamoto

    34th Symposium on Phase Change Oriented Science (PCOS2022)  2022.11 

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    Presentation type:Oral presentation (invited, special)  

  • Elucidation of ultrasonic emulsification phenomena through direct observation and three-phase multiphase flow simulation

    Takuya Yamamoto, Sergey Komarov

    4th International Symposium on Multiscale Multiphase Process Engineering (MMPE)  2022.09 

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    Presentation type:Oral presentation (general)  

  • ソノプロセス設計の基盤となるキャビテーションと音響流に対する現象解明 Invited

    山本卓也

    化学工学会 第27回東北ジョイント夏季セミナー  2022.09 

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    Presentation type:Oral presentation (general)  

  • Elucidation of bubble dynamics of acoustic cavitation in a sonochemical process Invited

    Takuya Yamamoto, Sergey V. Komarov

    2022.09 

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    Presentation type:Oral presentation (invited, special)  

  • 流体力学的キャビテーションを利用したアルミニウム金属間化合物の形態変化 Invited

    東健之輔, 山本卓也, 孫錦成, コマロフセルゲイ

    資源・素材学会 資源・素材 2022  2022.09 

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    Presentation type:Oral presentation (general)  

  • OpenFOAMのVOF法における計算時間、計算誤差最小条件の探索

    山本卓也, コマロフセルゲイ

    オープンCAEシンポジウム2022  2022.09 

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    Presentation type:Oral presentation (general)  

  • 数値解析技術を利用した相変化を伴う熱物質流体現象の解明 Invited

    山本卓也

    第34回中国四国伝熱セミナー・倉敷 ~熱移動を伴う諸現象の新展開~  2022.08 

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    Presentation type:Oral presentation (general)  

  • Al-Mg合金DC鋳造時におけるチャンネル型偏析に及ぼす微細組織パラメータの影響

    山本卓也, 神谷京佑, 久保貴司, コマロフセルゲイ

    第142回軽金属学会春期大会  2022.05 

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    Presentation type:Oral presentation (general)  

  • 機械学習を用いた材料設計指針開発〜相変化メモリ材料への適用例〜 Invited

    山本卓也

    令和3年度日本材料科学会北海道・東北支部 第4回 材料科学コロキウム  2022.03 

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    Presentation type:Oral presentation (general)  

  • ソノケミカルプロセス設計指針構築に向けた基礎現象解明 Invited

    山本卓也

    化学工学会第87年会  2022.03 

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    Presentation type:Oral presentation (general)  

  • マルチバブル系における音響ウェーク効果による音響キャビテーション気泡振動増幅

    山本卓也, コマロフセルゲイ

    第20回キャビテーションに関するシンポジウム  2021.12 

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    Presentation type:Oral presentation (general)  

  • OpenFOAMにおけるVOF法の最適利用方法の探索

    山本卓也, コマロフセルゲイ

    OpenCAEシンポジウム2021  2021.12 

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    Presentation type:Oral presentation (general)  

  • Al-Mg合金DC鋳造時に形成するチャンネル型偏析の3次元モルフォロジーに対する数値解析

    山本卓也, 神谷京佑, 久保貴司, 常川雅功, コマロフセルゲイ

    第141回軽金属学会秋期大会  2021.11 

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    Presentation type:Oral presentation (general)  

  • 物理モデル実験によるアルミニウム溶解炉における回転式フラックス吹込み処理効率の改善

    山本卓也, 高橋華子, 繁光将也, 谷口諒輔, 石渡保生, コマロフセルゲイ

    第141回軽金属学会秋期大会  2021.11 

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    Presentation type:Oral presentation (general)  

  • Enhancement of oscillation amplitude of cavitation bubble in a cavitation cloud

    T. Yamamoto, S. Komarov

    ESS-JSS-AOSS Joint Sonochemistry Conference  2021.11 

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    Presentation type:Oral presentation (general)  

  • マルチバブル系における音響キャビテーション気泡の振動に対する数値解析

    山本卓也, コマロフセルゲイ

    第30回ソノケミストリー討論会  2021.10 

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    Presentation type:Oral presentation (general)  

  • Al-Mg合金半連続鋳造プロセス中のチャンネル型偏析形成機構の解明

    山本卓也, 神谷京祐, 布川啓太, 蓬田翔平, 久保貴司, 常川雅功, コマロフセルゲイ

    日本金属学会 秋期第169回講演大会  2021.09 

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    Presentation type:Oral presentation (general)  

  • Development and validation of numerical model to investigate the phenomena occurring in aluminum ultrasonic DC casting process

    Takuya Yamamoto, Sergey Komarov

    2021.05 

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    Presentation type:Oral presentation (general)  

  • オープンソースを活用した溶融金属の凝固過程の数値シミュレーション Invited

    山本卓也

    第8回 RC287 「新時代の電子デバイスと電子機器における信頼性設計評価と熱設計に関する研究分科会」  2021.03 

  • 超音波利用プロセススケールアップに向けた基礎現象解明と数値モデル開発 Invited

    山本卓也

    化学工学会反応工学部会若手会(反好会)第20回反好会講演会  2021.03 

  • アルミニウムの溶解鋳造プロセスにおけるOpenFOAMの適用

    山本卓也, コマロフセルゲイ

    OpenCAE FrontISTR Joint symposium 2020  2020.12 

  • 数値解析による視覚化を利用したアルミニウム溶湯・鋳造プロセスの迅速化と定量化 Invited

    山本卓也, コマロフセルゲイ

    金属学会第167回講演大会  2020.09 

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    Presentation type:Oral presentation (invited, special)  

  • 機械攪拌時自由表面動的変形挙動に対する攪拌方法、攪拌翼の影響

    山本卓也, コマロフセルゲイ

    日本鉄鋼協会第180回秋季講演大会  2020.09 

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    Presentation type:Oral presentation (general)  

  • 超音波DC鋳造におけるビレット表面特性に対するサンプ内溶湯流れの数値解析

    山本卓也, コマロフセルゲイ

    軽金属学会第138回春季大会  2020.05 

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    Presentation type:Oral presentation (general)  

  • 移動速度論を用いた数値シミュレーションによる製鋼プロセスの解明 Invited

    山本卓也

    鉄鋼協会東北支部 東北地区講演会および若手研究者フォーラム  2020.01 

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    Presentation type:Symposium, workshop panel (nominated)  

  • 圧縮性3相流シミュレーションによるエマルジョン化時に発生する高速液体ジェット方向依存性

    山本卓也, コマロフセルゲイ

    第28回ソノケミストリー討論会  2019.11 

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    Presentation type:Oral presentation (general)  

  • CO2吸収実験によるアルミニウム溶解炉内ドロス発生量の予測

    山本卓也, 加藤賢也, コマロフセルゲイ, 谷口諒輔, 石渡保生

    軽金属学会第137回秋期大会  2019.11 

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    Presentation type:Oral presentation (general)  

  • 数値シミュレーションによるアルミニウム溶湯処理の視覚化と定量化 Invited

    山本卓也

    軽金属学会第137回秋期大会  2019.11 

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    Presentation type:Oral presentation (invited, special)  

  • 異なる翼端渦条件におけるアルミニウム機械撹拌中気泡分裂挙動の解明

    山本卓也, コマロフセルゲイ, 石渡保生

    軽金属学会第137回秋期大会  2019.11 

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    Presentation type:Oral presentation (general)  

  • 金属材料プロセス中の界面移動現象 Invited

    山本卓也

    日本鉄鋼協会東海支部若手冶金エンジニア研究会  2019.10 

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    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  • Three-dimensional simulation and experimental verification of cavitation bubble behaviour under relatively small ultrasound pressure amplitudes

    T. Yamamoto, S. I. Hatanaka, S. Komarov

    4th meeting of the Asia-Oceania Society of Sonochemistry (AOSS-4)  2019.09 

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    Presentation type:Poster presentation  

  • RH脱ガスプロセス簡易モデルによる気泡分裂、介在物挙動の解明

    山本卓也, Komarov Sergey

    日本鉄鋼協会第178回秋季講演大会  2019.09 

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    Presentation type:Oral presentation (general)  

  • 材料プロセス中移動現象シミュレーション Invited

    山本卓也

    日本鉄鋼協会高温プロセス部会若手フォーラム  2019.07 

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    Presentation type:Symposium, workshop panel (nominated)  

  • アルミニウム脱ガス装置内気泡分裂挙動の解明 Invited

    山本卓也, Komarov Sergey

    第112回軽金属シンポジウム 「アルミニウム溶湯処理・溶湯品質評価方法」  2019.06 

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    Presentation type:Symposium, workshop panel (nominated)  

  • 材料プロセス中の移動現象シミュレーション Invited

    山本卓也

    第7回鉄鋼協会産学連携交流会  2019.06 

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    Presentation type:Symposium, workshop panel (nominated)  

  • 攪拌時表面渦形成と気泡巻き込みに対するその場観察と数値シミュレーション Invited

    山本卓也, 方毓, Komarov Sergey

    化学工学会第84回年会  2019.03 

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    Presentation type:Oral presentation (invited, special)  

  • 3次元圧縮性流体シミュレーションによる超音波キャビテーション気泡振動挙動の解明

    山本卓也, Komarov Sergey

    第27回ソノケミストリー討論会  2018.11 

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    Presentation type:Oral presentation (general)  

  • アルミニウム溶湯の機械攪拌における偏心に対する自由表面変形の影響

    山本卓也, Komarov Sergey

    軽金属学会第135回秋期大会  2018.11 

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    Presentation type:Oral presentation (general)  

  • アルミニウム液浴の機械攪拌における単一気泡分裂挙動に対する大規模シミュレーションと直接観察

    山本卓也, Komarov Sergey

    軽金属学会第135回秋期大会  2018.11 

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    Presentation type:Oral presentation (general)  

  • FDM型3Dプリンターの樹脂流れと凝固シミュレーションモデルの確立

    山本卓也, 福江高志, Komarov Sergey

    化学工学会第50回秋季大会  2018.09 

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    Presentation type:Oral presentation (general)  

  • 攪拌時表面渦形成と気泡巻き込みに対するその場観察と数値シミュレーション

    山本卓也, 方毓, Komarov Sergey

    化学工学会第50回秋季大会  2018.09 

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    Presentation type:Oral presentation (general)  

  • 超音波照射時音響影響に対する移動現象論に基づく数値モデル化 Invited

    山本卓也, Komarov Sergey

    化学工学会第50回秋季大会  2018.09 

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    Presentation type:Oral presentation (invited, special)  

  • A novel numerical model for prediction of hydrogen bubble behavior during aluminum casting

    T. Yamamoto, S. Komarov

    International Conference on Aluminum Alloys 16 (ICAA16)  2018.06 

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    Presentation type:Oral presentation (general)  

  • アルミニウム溶湯処理時撹拌操作に対する低コストシミュレーションモデルの開発

    山本卓也, 加藤賢也, Komarov Sergey, 上野泰典, 石渡保生

    軽金属学会第134回春季大会  2018.05 

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    Presentation type:Oral presentation (general)  

  • アルミニウム溶湯機械撹拌における自由表面変形の基礎メカニズム解明

    山本卓也, Komarov Sergey

    軽金属学会第134回春季大会  2018.05 

  • アルミニウム凝固時に発生する水素気泡のダイナミクスに対するモデル開発

    山本卓也, Komarov Sergey

    化学工学会第83年会  2018.03 

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    Presentation type:Oral presentation (general)  

  • 移動現象を生かしたアルミニウム製造プロセス内シミュレーション Invited

    山本卓也

    平成29年度軽金属学会東北支部講演会およびイブニングセミナー  2018.03 

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    Presentation type:Oral presentation (invited, special)  

  • 超音波キャビテーション由来の音響流に対する新規数値モデル開発

    山本卓也, 方毓, Komarov Sergey

    化学工学会第83年会  2018.03 

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    Presentation type:Oral presentation (general)  

  • アルミニウム鋳造時における凝固と水素気泡発生を伴う熱流動予測数値モデルの開発

    山本卓也, コマロフセルゲイ

    軽金属学会第133回秋季大会  2017.11 

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    Presentation type:Oral presentation (general)  

  • 液膜内サーモキャピラリー対流の流動方向に対するメカニズム解明

    山本卓也, 岡野泰則

    化学工学会第82年会  2017.03 

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    Presentation type:Oral presentation (general)  

  • マイクロ流動・伝熱現象に対する数値シミュレーションモデルの開発 Invited

    山本卓也

    マイクロ流動マイクロ伝熱現象に対する化学工学的アプローチの探索  2016.12 

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    Presentation type:Oral presentation (invited, special)  

  • Marangoni効果に対する空間スケールの影響に関する数値解析

    山本卓也, 今井耀介, 岡野泰則, 佐藤竜馬, 重田育照

    化学工学会第48秋季大会  2016.09 

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    Presentation type:Oral presentation (general)  

  • TSSG法によるSiC結晶成長炉内移動現象に関する数値シミュレーション

    山本卓也, 岡野泰則, 宇治原徹

    化学工学会第48秋季大会  2016.09 

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    Presentation type:Oral presentation (general)  

  • 微小スケールにおける熱物質輸送を伴う気液混相流解析手法の開発

    山本卓也, 岡野泰則

    第53回日本伝熱シンポジウム  2016.05 

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    Presentation type:Oral presentation (general)  

  • Numerical Investigation of Marangoni convection in a micro-scale environment

    T. Yamamoto, Y. Okano

    The first Pacific Rim Thermal Engineering Conference (PRTEC2016)  2016.03 

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    Presentation type:Oral presentation (general)  

  • 大学院生としてどのようにオープンCAEコミュニティーに貢献できるか? Invited

    山本卓也

    オープンCAEシンポジウム2015  2015.11 

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    Presentation type:Oral presentation (invited, special)  

  • マイクロ流動場におけるMarangoni対流に関する数値解析

    山本卓也, 岡野泰則

    日本機械学会熱工学コンファレンス2015  2015.10 

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    Presentation type:Oral presentation (general)  

  • Liquid film volume effect on unsteady thermocapillary flow due to Hydrothermal Wave in a thin circular liquid film

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    The joint conference of 6th International Symposium on Physical Science in Space (ISPS6) and 10th International Conference on Two-Phase Systems for Space and Ground Applications (ITTW2015)  2015.09 

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    Presentation type:Oral presentation (general)  

  • 円形液膜内振動Marangoni対流に対する数値解析

    山本卓也, 高木洋平, 岡野泰則

    日本流体力学会年会2015  2015.09 

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    Presentation type:Oral presentation (general)  

  • 温度差Marangoni対流を考慮したS-CLSVOF法の開発と検証

    山本卓也, 岡野泰則

    化学工学会第47秋季大会  2015.09 

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    Presentation type:Oral presentation (general)  

  • Verification and validation of thermocapillary flow instability in straight and deformed liquid bridges

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    OpenFOAM Workshop 2015  2015.06 

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    Presentation type:Oral presentation (general)  

  • Landau-Lifshitz Navier Stokes式による熱揺動と流体場の関係性に関する数値解析

    山本卓也, 岡野泰則

    化学工学会第80年会  2015.03 

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    Presentation type:Oral presentation (general)  

  • Numerical study of thermocapillary flow in a liquid film under micro- and normal- gravity conditions

    T. Yamamoto, Y. Takagi, Y. Okano

    Chemical Engineering Colloquium (CEEC)  2015.03 

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    Presentation type:Oral presentation (general)  

  • OpenFOAMを用いた界面移動現象の数値解析 Invited

    山本卓也

    PUCA2014-ESI Users’ Forum Japan- OF07  2014.11 

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    Presentation type:Oral presentation (invited, special)  

  • Landau-Lifshitz Navier Stokes式の無次元評価と数値解析

    山本卓也, 岡野泰則

    第28回数値流体力学シンポジウム  2014.11 

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    Presentation type:Oral presentation (general)  

  • 液膜内Marangoni対流の流動方向に対する液膜形状と渦の関係性の影響に関する数値解析

    山本卓也, 高木洋平, 岡野泰則

    化学工学会第46秋季大会  2014.11 

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    Presentation type:Oral presentation (general)  

  • 液膜内マランゴニ対流現象に関する数値解析

    山本卓也, 高木洋平, 岡野泰則

    日本機械学会熱工学コンファレンス2014  2014.11 

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    Presentation type:Oral presentation (general)  

  • Numerical investigation for the direction of thermocapillary flow in a cooled circular water film

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    7th conference of the International Marangoni Association  2014.06 

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    Presentation type:Poster presentation  

  • Numerical investigation for the thermocapillary flow observed in “Saturday-Morning-Science” conducted by Dr. Donald Pettit

    T. Yamamoto, Y. Takagi, Y. Okano, S. Dost

    29th American Society for Gravitational and Space Research and 5th International Symposium for Physical Science in Space (ASGSR/ISPS5)  2013.11 

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    Presentation type:Oral presentation (general)  

  • 液膜内thermocapillary対流の流動方向に対する数値解析

    山本卓也, 高木洋平, 岡野泰則

    第51回日本伝熱シンポジウム  2013.11 

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    Presentation type:Oral presentation (general)  

  • 液膜内thermocapillary流れ方向性に対する体積比の影響に関する数値解析

    山本卓也, 高木洋平, 岡野泰則

    日本マイクログラビティ応用学会第27回学術講演会(JASMAC-27)  2013.11 

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    Presentation type:Oral presentation (general)  

  • 静止液膜形状の影響を考慮した円形液膜内温度差マランゴニ対流に関する数値解析

    山本卓也, 高木洋平, 岡野泰則

    化学工学会第45秋季大会  2013.09 

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    Presentation type:Oral presentation (general)  

  • Numerical simulation of thermocapillary flow in a circular thin concave and convex liquid film under micro-gravity field

    T. Yamamoto, Y. Takagi, Y. Okano

    8th International OpenFOAM Workshop  2013.06 

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    Presentation type:Oral presentation (general)  

  • A three-dimensional simulation of thermocapillary flow in a circular thin liquid film under zero gravity

    T. Yamamoto

    the 29th International Symposium on Space Technology and Science (ISTS-29)  2013.06 

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    Presentation type:Oral presentation (general)  

  • 液膜上サーモキャピラリー流れ方向に及ぼす液膜形状の影響に関する数値解析

    山本卓也, 高木洋平, 岡野泰則

    化学工学会第78年会  2013.03 

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    Presentation type:Oral presentation (general)  

  • 円形液膜内マランゴニ対流の三次元シミュレーション

    山本卓也, 高木洋平, 伴貴彦, 岡野泰則, 水口尚

    第26回数値流体力学シンポジウム  2012.12 

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    Presentation type:Oral presentation (general)  

  • OpenFOAMを用いた液膜内マランゴニ対流の解析

    山本卓也, 高木洋平, 岡野泰則

    OpenCAEシンポジウム2012  2012.12 

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    Presentation type:Oral presentation (general)  

  • Numerical investigation for the effect of meniscus geometry on thermocapillary flow in a thin liquid film

    T. Yamamoto, Y. Takagi, T. Ban, Y. Okano, H. Minakuchi, S. Dost

    The 23rd International symposium on transport phenomena  2012.11 

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    Presentation type:Oral presentation (general)  

  • 液膜内マランゴニ対流に及ぼすメニスカス形状の影響に関する数値解析

    山本卓也, 高木洋平, 伴貴彦, 岡野泰則, 水口尚

    化学工学会第44秋季大会  2012.09 

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    Presentation type:Oral presentation (general)  

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Industrial Property Rights

  • 金属溶湯用インペラー

    鈴木藍礼, 山本卓也, 繁光将也, 谷口諒輔, 石渡保生, コマロフセルゲイ

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    property_type:Design 

    Application no:2020-7475 

    Patent/Registration no:1672079 

  • 気泡分散装置およびインペラー

    鈴木藍礼, 山本卓也, 繁光将也, 谷口諒輔, 石渡保生, コマロフセルゲイ

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    property_type:Patent 

    Application no:特願2022-513819 

Grant-in-Aid for Scientific Research

  • データ同化、数理最適化を融合したプロセス迅速設計方法論の構築

    Grant-in-Aid for Early-Career Scientists  2023.04

  • 水素プラズマを利用したチタン製精錬プロセスの革新

    Grant-in-Aid for Challenging Research (Pioneering)/(Exploratory)  2022.04

  • 多形メモリテクノロジーの創成

    Grant-in-Aid for Scientific Research(S)  2021.04

  • 次世代新メモリに向けたディスプレイシブ相転移型多形半導体の開拓

    Grant-in-Aid for Scientific Research(A)  2021.04

  • ミクロマクロ現象同時制御による超音波処理スケールアップ指針の確立

    Grant-in-Aid for Early-Career Scientists  2020.04

  • マルチマテリアル化を飛躍的に促進する表面改質技術の開拓

    Grant-in-Aid for Scientific Research(B)  2019.04

  • 「フローズンエマルジョン」新しいタイプの複合材料創製への挑戦

    Grant-in-Aid for Challenging Research (Pioneering)/(Exploratory)  2017.04

  • ミクロからマクロまでのスケールを統一的に扱える「界面」現象理論と解析手法の構築

    Grant-in-Aid for Special Purposes  2015.04

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Contract research

  • ソノケモフルイディクス論による化学流体場の予測

    JST  戦略的創造研究推進事業 さきがけ  2022.09

  • 多数の制約条件の中から材料プロセス設計条件を迅速に導き出す

    NEDO  官民による若手研究者発掘支援事業 マッチングサポートフェーズ  2022.09

  • 流体力学的キャビテーションによるアルミニウム不純物無害化技術の開拓

    JOGMEC  金属資源の生産技術に関する基礎研究  2020.08

Incentive donations / subsidies

  • 反応性混相流数値モデル開発のための局所界面反応速度の定量化

    日本鉄鋼協会  第 32 回鉄鋼研究振興助成(含む石原・浅田研究助成)  2023.06

  • 超音波水処理時の高効率反応条件自動探索方法の開発

    クリタ水・環境科学振興財団  クリタ水・環境科学振興財団 研究助成  2022.10

  • 自動最適化を利用した鋳造最適条件探索方法の開発

    日本アルミニウム協会  令和4年度 アルミニウム研究助成  2022.04

  • アルミニウム超音波DC鋳造プロセスの数値モデル開発

    軽金属奨学会  軽金属奨学会 研究補助金  2022.04

  • アルミニウム超音波DC鋳造プロセスの数値モデル開発

    軽金属奨学会  軽金属奨学会 研究補助金  2021.04

  • アルミニウム生産プロセスの効率化を達成する炉内移動現象モデルの開発

    軽金属奨励会  軽金属奨励会 研究補助金  2020.04

  • マルチスケール・マルチフェーズシミュレーションによる超音波キャビテーションの探究

    クリタ水・環境科学振興財団  2019.10

  • 偏心したKR法における界面ダイナミクスの探求

    日本鉄鋼協会  第28回鉄鋼研究振興助成(含む石原・浅田研究助成)  2019.06

  • アルミニウム生産プロセスの効率化を達成する炉内移動現象モデルの開発

    公益財団法人 軽金属奨学会  研究補助金  2019.04

  • マルチスケール・マルチフェーズシミュレーションによる超音波キャビテーションの探究

    クリタ水環境科学振興財団  クリタ水・環境科学振興財団 研究助成  2018.10

  • アルミニウム生産プロセスの効率 化を達成する炉内移動現象モデルの開発

    軽金属奨学会  研究補助金  2018.04

  • 産業スケールでのアルミ溶湯に対するCAE適用のためのモデル開発

    日本アルミニウム協会  平成 30 年度 アルミニウム研究助成  2018.04

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Charge of off-campus class subject

  • 化学工学実験II

    2023.10
    -
    Now

  • 移動速度論I

    2023.10
    -
    Now

  • 化学工学数学演習

    2023.10
    -
    Now

  • 化学工学流体力学特論

    2023.04
    -
    Now

  • 創造工学研修

    2018.10
    -
    Now

  • 電気工学実験

    2018.10
    -
    2019.03

  • 数学物理学演習I

    2018.04
    -
    Now

  • 材料科学総合学実験

    2017.10
    -
    Now

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Media Coverage

  • メモリー材料、消費電力100分の1も 東北大がAIで探索 Newspaper, magazine

    日経産業新聞  2022.04

  • 東北大、相変化メモリの消費電力を従来の1/100に低減できる開発指針を発表 Internet

    TECH+(マイナビニュース)  2022.03

  • 東北大,機械学習でデータ書き込み電力を1/100に Internet

    Optronics  2022.03

  • 東北大が半導体の材料探索に機械学習、相変化メモリの設計で Internet

    MIT Technology Review Japan  2022.03

  • 東北大、超省エネルギー相変化メモリ材料の設計に有効な機械学習を用いた自動最適化フレームワークを開発 Internet

    日本経済新聞電子版  2022.03