Matsuda Shoichi

写真a

Title

Associate Professor

Researcher Number(JSPS Kakenhi)

90390567

Date of Birth

1971

Laboratory Address

1 Senbaru,Nishihara,Okinawa

Mail Address

E-mail address

Laboratory Phone number

-9525

Laboratory Fax number

-9525

Current Affiliation Organization 【 display / non-display

  • Duty   University of the Ryukyus   Faculty of Engineering   School of Engineering_Energy and Environment Program   Associate Professor  

Academic degree 【 display / non-display

  • University of the Ryukyus -  Doctor of Engineering

External Career 【 display / non-display

  • 2001.09
    -
    2003.02

    Kanehide Holdings Co., LTD. Fellow Researcher  

  • 2003.03
    -
    2004.03

    Institute of Ocean Energy, Saga University, Japan Fellow Researcher  

  • 2004.04
    -
    2009.02

    Okinawa National College of Technology Research Associate  

  • 2009.03
    -
    2014.03

    University of the Ryukyus, Faculty of Engineering, Department of Mechanical Systems Engineering, Research Associate  

  • 2014.04
     
     

    University of the Ryukyus, Faculty of Engineering, Department of Mechanical Systems Engineering, Associate professor  

Affiliated academic organizations 【 display / non-display

  • 1997.04
    -
    Now
     

    The Japan Society of Mechanical Engineers 

  • 2003.04
    -
    Now
     

    Heat Transfer Society of Japan 

  • 2004.04
    -
    Now
     

    Japanese Society for Engineering Education 

  • 2005.04
    -
    Now
     

    Japan Welding Society HomePage 

  • 2014.07
    -
    Now
     

    The Iron and Steel Institute of Japan 

Research Interests 【 display / non-display

  • Welding engineering

  • Magnetic control welding

  • Plasma engineering

  • Thermal engineering

  • Fluid engineering

Research Areas 【 display / non-display

  • Nanotechnology/Materials / Material processing and microstructure control

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

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

Research Theme 【 display / non-display

  • Study on Impingement Heat Transfer

  • Study on heat resistance properties of ablation materials

Thesis 【 display / non-display

  • 衝突噴流の時・空間温度および流動場の可視化による熱伝達特性に関する実験的研究

    2000.03

Published Papers 【 display / non-display

  • Analytical solution for the problem of one-dimensional quasi-steady non-charring ablation in a semi-infinite solid with temperature-dependent thermo-physical properties

    Kato S., Matsuda, S.

    Thermal Science and Engineering Progress ( Thermal Science and Engineering Progress )  31   2022.06 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    Exact quasi-steady solution of temperature distribution for one-dimensional non-charring ablation in a semi-infinite material with temperature-dependent thermo-physical properties is obtained analytically, in which the surface temperature and the surface recession velocity are assumed to be constant. The analytical solutions for the cases in which thermo-physical properties are expressed by low degree polynomial functions of temperature are also obtained. Two kinds of non-charring ablation models are considered. One is a single phase model composed of a single phase (the crystalline phase), in which the surface recedes due to ablation. The other is a two-phase model composed of two phases (the crystalline and the amorphous phases) such as Teflon, in which the surface of the amorphous region recedes. The calculated results of the analytical solution agreed well with those of the numerical solution by the finite difference method. The basic behavior of Teflon ablation is calculated by using the analytical solution. The simple and exact analytical solution obtained in this paper is easy to calculate and is helpful in understanding the ablation behavior easily. It allows for rapid estimation of the ablation behavior for engineering purposes. The solution also provides a means to verify computer solutions obtained by numerical methods.

  • A modified perturbation method in which the applicable range of a small parameter for the solution is extended much larger than that by the conventional perturbation method

    KATO Sumio, MATSUDA Shoichi

    Mechanical Engineering Journal ( 一般社団法人 日本機械学会 )  8 ( 6 ) 21-00153 - 21-00153   2021.08 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    <p>A modified perturbation method, in which the applicable range of a small parameter <i>ε</i> for the solution is extended larger than that by the conventional perturbation method, is applied to two simple heat transfer problems with temperature-dependent thermal properties. The main procedure of the modified perturbation method is: (1) A perturbation parameter <i>ε</i> is assumed to be included in the nonlinear term of the differential equation. The solution <i>θ</i> is expressed by <i>θ</i> = <i>φ</i> + <i>θ</i><sub>f</sub>, where <i>θ</i><sub>f</sub> is an initial approximation of the solution and <i>φ</i> is <i>θ</i> − <i>θ</i><sub>f</sub>. (In the example problems of this paper, we assume that <i>θ</i><sub>f</sub> is a constant.) (2) <i>θ</i> = <i>φ</i> + <i>θ</i><sub>f</sub> is substituted into the differential equation and the nonlinear term is split into linear and nonlinear terms. (3) <i>ε</i> which is not in the nonlinear term is replaced by a newly introduced variable <i>ε</i>’. (4) An asymptotic expansion of <i>φ</i> in powers of <i>ε</i> is assumed for the solution of the differential equation, from which we obtain the perturbation solution of <i>φ</i> including <i>ε</i>’ and <i>ε</i>’. (5) <i>ε</i> in the perturbation solution of <i>φ</i> is replaced by <i>ε</i>. Then we obtain the perturbation solution of <i>θ</i>. By solving the two example problems, it is made clear that the solution by the modified perturbation method is more accurate than that by the conventional perturbation method. It is also made clear that the modified perturbation method extends drastically the applicable range of the perturbation parameter in comparison with the conventional perturbation method. The modifications of the perturbation method help reduce the contribution of the nonlinear term, which drastically improves the convergence characteristics of the solution. The reason for the good convergence characteristics of the modified perturbation solution is discussed.</p>

  • Study on penetration control of the arc welding using external magnetic field– Influence of external magnetic field on arc shape and heat input– 

    Shoichi MATSUDA Manabu TANAKA and Yasushi TANAHARA

    Proceedings of the Visual-JW 2019 and WSE 2019 ( Joining and Welding Research Institute Osaka University )    2019.11 [ Peer Review Accepted ]

    Type of publication: Research paper (international conference proceedings)

  • One-dimensional Ablation Analysis of Lightweight CFRP Ablators with Coking

    KATO Sumio, MATSUDA Shoichi, SHIMADA Naoyuki, SAKAI Shunsuke, OKUYAMA Keiichi, SZASZ Bianca, SHIMODA Takayuki

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 日本航空宇宙学会 )  17 ( 4 ) 461 - 470   2019.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    <p>The coking phenomenon within a lightweight carbon-phenolic ablator exposed to the heating environment of air is investigated. The existing one-dimensional charring ablation analysis code is modified so that the coking behavior of the ablator can be calculated as well as the thermal response behavior within a lightweight carbon-phenolic ablator. The mass conservation equations for a pyrolysis gas and carbon in the gas are given. The energy equation including the coking process is also presented. The measured density distributions of some arc-heated CFRP ablator samples are compared with those calculated by the ablation analysis code, from which good agreement is obtained. The density profiles with and without coking are compared. The effect of temperature dependency of carbon mass fraction in a pyrolysis gas in the coking equation upon the density profile is examined. The effect of heating rate upon the density distribution in an ablator is also examined. The effect of coking upon the surface recession is studied analytically and experimentally.</p>

  • Study on penetration control of the arc welding using external magnetic field

    Shoichi Matsuda,Manabu Tanaka,Yasushi Tanahara,Tomohiro Nakayama

    The Symposium of Thailand Welding and Inspection Technology 2018 (TWIT 2018) ( Mahidol University )    2018.11 [ Peer Review Accepted ]

    Type of publication: Research paper (international conference proceedings)

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Presentations 【 display / non-display

  • Control of molten metal flow for helium gas tungsten arc welding by an external magnetic field

    S. Matsuda, Y. Tanahara, M. Tanaka

    2021.11  -  2021.11 

  • Study on high quality and high efficiency GMA welding using external magnetic field Influence of alternative magnetic field on arc shape and bead shape

    MATSUDA Shoichi, TANAHARA Yasushi and TANAKA Manabu

    Japan Welding Society, Autumn Meeting  (on line)  2021.09  -  2021.09 

  • Influence of External Magnetic Field in Helium Gas Tungsten Arc Welding on Molten Metal Flow and Bead Shape

    MATSUDA Shoichi, TANAHARA Yasushi and TANAKA Manabu

    The Iron and Steel Institute of Japan, Autumn Meeting  (on line)  2021.09  -  2021.09 

  • Study on ocean thermal energy and effective utilization of deep seawater in Okinawa (Heat transfer characteristics of Fan Coil Unit)

    Shoichi MATSUDA and Hirofumi ARIMA

    Ocean Energy Symposium  (on line)  2020.09  -  2020.09 

  • Study of heat transfer characteristics from impinging jet with small diameter circular orifice nozzle at low Reynolds number

    Shoichi MATSUDA, Sumio KATOU and Takamitsu AKIBA

    The Japan Society of Mechanical Engineers,annual meeting  (on line)  2020.09  -  2020.09 

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SDGs 【 display / non-display

  • 海洋温度差および深層水利用の研究