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Local heat-transfer characteristic of a micro droplet impacting onto a heated surface under depressurized environment

Research Project

Project/Area Number 16K14166
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Fluid engineering
Research InstitutionJapan Aerospace EXploration Agency

Principal Investigator

Hatakenaka Ryuta  国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 研究開発員 (80725333)

Co-Investigator(Kenkyū-buntansha) 田川 義之  東京農工大学, 工学(系)研究科(研究院), 准教授 (70700011)
Research Collaborator Fujita Yuta  
Tran Tuan  
Breitenbach Jan  
Roisman Ilia V.  
Tropea Cameron  
Harth Kirsten  
Lohse Detlef  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords液滴 / ライデンフロスト / 減圧環境 / 真空環境 / 熱電対 / 気泡成長 / 全反射法 / 気泡核生成 / 気泡核生成/成長 / 混相流 / 熱工学 / 宇宙工学 / 再突入
Outline of Final Research Achievements

For the development of spray cooling device for space use, single drop impacting onto a heated surface under depressurized environment has been studied. Two characteristic drop behaviors of depressurized environments are newly identified. A theoretical model for the mechanism of one of those has been proposed, whose validity is confirmed by direct observation of growing bubble between the drop and surface. In addition, existing theoretical models for the splash threshold are confirmed not to be directly applicable to micro-sized droplet, which is commonly used for spray cooling. Finally, an elemental prototyping of a fast-response thermocouple array aiming to measurement of local heat flux distributions at the heated surface during drop impact has been conducted, which has successfully demonstrated its feasibility.

Academic Significance and Societal Importance of the Research Achievements

減圧環境下に特有の液滴挙動が新たに識別され、その発生メカニズムにおける気泡成長特性の重要性が示されたことは、減圧環境下における液滴挙動を予測するために重要な知見である。また、過去に提案された各種物理モデルを大きく異なる液滴径に適用できるかを検証できないことが多いため、本研究で得られたマイクロ液滴の実験的知見は貴重である。また、相変化を伴う冷却技術の研究では蒸発/沸騰に伴う局所的・過渡的な熱流束を適切に評価することが極めて重要であり、本研究で開発を進めた高速応答熱電対アレイを適用できれば新たな学術的な成果が期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (20 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (5 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (10 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results)

  • [Int'l Joint Research] Darmstadt工科大学(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Nanyang工科大学(シンガポール)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Twente大学(オランダ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Darmstadt工科大学(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Nanyang工科大学(シンガポール)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Jet Velocity Control Method Using PVA Gel for a New Ink-jet Generator2019

    • Author(s)
      前嶋麻緒,工藤帆乃香,大貫甫,栗原千尋,木山景仁,田川義之
    • Journal Title

      NIHON GAZO GAKKAISHI (Journal of the Imaging Society of Japan)

      Volume: 58 Issue: 1 Pages: 19-27

    • DOI

      10.11370/isj.58.19

    • NAID

      130007593393

    • ISSN
      1344-4425, 1880-4675
    • Year and Date
      2019-02-10
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Droplet levitation over a moving wall with a steady air film2019

    • Author(s)
      Sawaguchi, E., Matsuda, A., Hama, K., Saito, M., and Tagawa, Y.
    • Journal Title

      Journal of Fluid Mechanics

      Volume: 862 Pages: 261-282

    • DOI

      10.1017/jfm.2018.952

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Visualization of penetration of a high-speed focused microjet into gel and animal skin2019

    • Author(s)
      Kiyama, A., Endo, N., Kawamoto, S., Katsuta, S., Oida, K., Tanaka, A., and Tagawa, Y.
    • Journal Title

      Journal of Visualization

      Volume: - Issue: 3 Pages: 1-9

    • DOI

      10.1007/s12650-019-00547-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magic carpet breakup of a drop impacting onto a heated surface2018

    • Author(s)
      Ryuta Hatakenaka, Jan Breitenbach, Ilia V. Roisman, Cameron Tropea, and Yoshiyuki Tagawa
    • Journal Title

      Proceedings of 14th Triennial International Conference on Liquid Atomization and Spray Systems

      Volume: - Pages: 257-257

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 混相流研究のながれ -気泡/液滴研究の動向と展望-2018

    • Author(s)
      田川義之
    • Journal Title

      ながれ

      Volume: 37

    • Related Report
      2018 Annual Research Report
  • [Presentation] "Magic carpet" breakup of a drop impacting onto a heated surface2018

    • Author(s)
      R. Hatakenaka, J. Breitenbach, I. V. Roisman, C. Tropea, and Y. Tagawa
    • Organizer
      14th Triennial International Conference on Liquid Atomization and Spray Systems
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] "Magic carpet" breakup of a drop impacting onto a heated surface under reduced pressure2018

    • Author(s)
      R. Hatakenaka, J. Breitenbach, I. V. Roisman, C. Tropea, and Y. Tagawa
    • Organizer
      12th European Fluid Mechanics Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高速マイクロ液滴を用いたSplash発生条件の実験的解明2018

    • Author(s)
      藤田 裕太,田川 義之
    • Organizer
      日本機械学会2018年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Mechanism of microjet ejection with highly viscousfluids2018

    • Author(s)
      Onuki, H., and Tagawa, Y.
    • Organizer
      12th European Fluid Mechanics Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impact-induced cavitation and liquid jets2018

    • Author(s)
      Tagawa, Y.
    • Organizer
      Physics of Fluids for the 21st Century
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Jet ejection of inelastic and elastic non-Newtonian fluids by laser-induced shockwave2018

    • Author(s)
      Franco-Gomez, A., Nagatsu, Y., and Tagawa, Y.
    • Organizer
      71st Annual Meeting of the APS Division of Fluid Dynamics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental study on pressure balance of a droplet levitating over a moving wall2018

    • Author(s)
      Tagawa, Y., Matsuda, A., and Sawaguchi, E
    • Organizer
      71st Annual Meeting of the APS Division of Fluid Dynamics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-speed micro-droplet impact on a super-heated surface2017

    • Author(s)
      Fujita, Y., Tran, T., Tagawa, Y., Xie, Y., Sun, C., and Lohse, D.
    • Organizer
      70th Annual Meeting of the American Physical Society Division of Fluid Dynamics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 加熱平板への高速マイクロ液滴衝突2017

    • Author(s)
      藤田裕太,木山景仁,田川義之
    • Organizer
      混相流シンポジウム2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Droplet Impact on a Heated Surface under a Depressurized Environment2016

    • Author(s)
      R.Hatakenaka and Y. Tagawa
    • Organizer
      The 69th Annual Meeting of The American Physical Society, Division of Fluid Dynamics
    • Place of Presentation
      Portland(米国)
    • Year and Date
      2016-11-20
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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