Gima Satoru

写真a

Title

Associate Professor

Researcher Number(JSPS Kakenhi)

60274883
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Engineering   School of Engineering_Mechanical Engineering Program   Associate Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Thermal and Fluid Engineering   Associate Professor  

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Academic degree 【 display / non-display 】

  • Kyushu University -  Doctor of Engineering

  • Kyushu University -  Master of Engineering

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External Career 【 display / non-display 】

  • 2004.06
    　
    　

    - , University of the Ryukyus, Faculty of Engineering, Associate Professor  

  • 2004.06
    　
    　

     

  • 2004.06
    　
    　

    University of the Ryukyus, Faculty of Engineering, Associate Professor  

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Research Interests 【 display / non-display 】

  • Heat Transfer,Convective Heat Transfer,Cooling of Electronic Equipment

  • 電子機器の冷却

  • 対流伝熱

  • 伝熱工学

  • Heat Transfer

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Research Areas 【 display / non-display 】

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

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

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Research Theme 【 display / non-display 】

  • Cooling of CPU Using a Natural Circulation Loop

  • Conjugate Heat Transfer in an Electronic Chip Module

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Published Papers 【 display / non-display 】

  • A case study of exam preparation course for mechanical design engineer 3rd grade

    SUEYOSHI Toshiyasu, GIMA Satoru, UEZATO Eiho, TERUYA Isao, OSHIKAWA Wataru, MIYAZAKI Tatsujiro

    The Proceedings of the Tecnology and Society Conference ( The Japan Society of Mechanical Engineers )  2022 ( 0 ) 331   2022

    Type of publication: Research paper (scientific journal)

    　View Summary

    <p>This report is a case study of a preparatory course for the Mechanical Design Engineer Examination conducted at the University of the Ryukyus. The Mechanical Design Engineer 3rd grade is an examination to evaluate and certify one's technical level. The subjects of the examination correspond to the required subjects of mechanical engineering. Examinees can check their own learning level, which is expected to improve their motivation for learning. The contents of this report include the method of implementation of the preparatory course, the number of examinees, and the passing rate. In addition, opinions from the students will also be presented.</p>

  • Performance of Multiple-Effect Diffusion Still for Seawater Concentration – Improved Fivefold-Effect Still Tilted at 45° with 5 mm Vapor-Diffusion Distances –

    Takehiro NOSOKO, Masaaki ISHIKAWA, Hisashi MINAKUCHI, Satoru GIMA and Tomohiro KASAHARA

    Society of Sea Water Science   73   292 - 299   2019.08 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Performance of Multiple-Effect Diffusion Still for Seawater Concentration

    NOSOKO Takehiro, ISHIKAWA Masaaki, MINAKUCHI Hisashi, GIMA Satoru, KASAHARA Tomohiro

    Bulletin of the Society of Sea Water Science, Japan ( The Society of Sea Water Science, Japan )  73 ( 5 ) 292 - 299   2019 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    A fivefold-effect still with 5 mm vapor-diffusion distances between evaporating and condensing surfaces was examined experimentally. Evaporating wicks were glued to metal plates, and concentrate was collected by gutters at the lower ends of the wicks. The still was tilted at a 45° degree angle, and heated on the 1×1.6 m<sup>2</sup> bottom area and cooled on the top by means of forced convection. The experimental results were compared to theoretical ones based on a two-dimensional steady-state model. The findings are summarized as (1)Gluing wicks to metal plates with double-sided adhesive tape prevents the appearance of air bubbles under evaporating wicks, keeping hydrophilicity of the wick high enough for evaporation. (2)The experimental evaporation rates from inner wicks are smaller than the theoretical ones, suggesting that part of the condensate comes down from upper plates and mixes with concentrate. (3)Experimental total evaporation rates are smaller than the theoretical ones by 12 % on average. (4)Experimental heat ratios of total evaporation to condensation on the first plate are smaller than theoretical ones by 13 % on average.

  • 非加熱蒸留部を有する拡散式多重効用蒸留器の数値解析

    野底 武浩, 車田 昌弥, 儀間 悟, 水口 尚

    日本海水学会誌 ( 日本海水学会 )  72 ( 2 ) 109 - 119   2018

    Type of publication: Research paper (scientific journal)

    　View Summary

    蒸発倍率を向上させることを目的に，加熱蒸留部と非加熱蒸留部から構成される拡散式多重効用蒸留器を提案し，100 ℃で加熱される，加熱部と非加熱部の長さ比が1：1の10段効用蒸留器について，定常二次元のモデルを構築し数値解析を行った．各効用段の加熱部においては，蒸留の進行とともに溶液と凝縮水は昇温して蓄熱し，非加熱部においては放熱して温度を低下させ蒸留を継続させるとともに，溶液と凝縮水が持ち出す熱量を大幅に減少させた．この流出熱量の減少により，蒸発倍率は24 ％向上した．総蒸発速度は，加熱蒸留部の長さを基準にすると50 ％の向上，加熱部と非加熱部を合わせた長さを基準にすると25 ％の低下であった．提案型蒸留器において，濃縮倍率を2倍から4倍に増加させた場合と，溶液の供給温度を30 ℃から60 ℃に上昇させた場合について数値解析を行い，濃縮倍率と供給温度の上昇により蒸発倍率がさらに向上することを示した．

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  • The relative contributions of thermo-solutal Marangoni convections on flow patterns in a liquid bridge

    H. Minakuchi, Y. Takagi, Y. Okano, S. Gima and S. Dost

    Journal of Crystal Growth ( その他の出版社 )  385   61 - 65   2014.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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