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Topology of thermocapillary-driven convection and induced coherent structures by low-Stokes-number particles in closed system with free surface

Research Project

Project/Area Number 20K20977
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 19:Fluid engineering, thermal engineering, and related fields
Research InstitutionTokyo University of Science

Principal Investigator

UENO ICHIRO  東京理科大学, 理工学部機械工学科, 教授 (40318209)

Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords表面張力差駆動対流 / コヒーレント構造 / 低ストークス数粒子
Outline of Research at the Start

本研究では,自由表面を有する閉空間内トポロジー対流場に微小な粒子群を付与した系を対象とする.表面張力差を駆動力とする対流場内に付与した低ストークス(St)数粒子が自発的に集合し,周方向に閉じた特異な粒子集合構造(PAS)が発現することが知られている.本研究では,Kolmogorov-Arnold-Moser(KAM)環状構造体と呼ばれるトポロジー対流場とコヒーレント構造の空間的位置関係,トポロジー対流場のアトラクタとしての低St数粒子への作用に注目し,コヒーレント構造の発現機構,トポロジー対流場と低St数粒子によるコヒーレント構造の時空間的相関の解明に挑戦する.

Outline of Final Research Achievements

We investigate the coherent structures by low-Stokes-number particles suspended in high-aspect-ratio liquid bridges of high-Prandtl number via microgravity and terrestrial experiments. We especially focus on the structure by the suspended particle accumulation, or, the particle accumulation structure (PAS), of m = 1 in azimuthal wave number emerged in the traveling-wave-type time-dependent convection. We also investigate multicellular convective structures induced in free liquid films by thermocapillary effect. A thin film of high-Prandtl-number liquid is prepared in a rectangular aperture of the order of 0.1 mm in thickness sustained by its surface tension. The multicellular structure is established in the free liquid films. The cell number increases in a stepwise manner as the liquid-film width increases. It is found that another pair of the cells always newly emerges when the cell number increases.

Academic Significance and Societal Importance of the Research Achievements

閉空間内対流場における秩序構造、さらにその対流場による微小粒子の集合・分散の制御を実現する。Kolmogorov-Arnold-Moser環状体と高い相関を有するコヒーレント構造の発現条件やその空間構造の定量化、コヒーレント構造を構成する微小粒子の時空間挙動の解明により学術的貢献に資するとともに、結晶成長過程における結晶核の集合・分散制御や、汚染源となる微小物体の効率的排除機構の開発等に貢献する。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Univ. Lille/Univ. Paris-Saclay/Univ. Cote d'Azur(フランス)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Multicellular structures in thin free liquid films induced by thermocapillary effect2023

    • Author(s)
      Takahiro Homma, Tokiya Yamashita, Ryohei Wada, Koki Kawazu, Kizuku Kurose, Takahiro Tsukahara and Ichiro Ueno
    • Journal Title

      J. Colloid Interface Science

      Volume: 641 Pages: 187-196

    • DOI

      10.1016/j.jcis.2023.02.151

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermocapillary-driven coherent structures by low-Stokes-number particles and their morphology in high-aspect-ratio liquid bridges2023

    • Author(s)
      Sayo Terasaki, Shogo Sensui and Ichiro Ueno
    • Journal Title

      International Journal Heat Mass Transfer

      Volume: 203 Pages: 123772-123772

    • DOI

      10.1016/j.ijheatmasstransfer.2022.123772

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Coherent structures of m = 1 by low-Stokes-number particles suspended in half-zone liquid bridge of high aspect ratio - microgravity and terrestrial experiments -2022

    • Author(s)
      Tomoki Sakata, Sayo Terasaki, Hiroki Saito, Sorachi Fujimoto, Ichiro Ueno, Taishi Yano, Koichi Nishino, Yasuhiro Kamotani, and Satoshi Matsumoto
    • Journal Title

      Physical Review Fluids 7

      Volume: vol.7 Issue: 1

    • DOI

      10.1103/physrevfluids.7.014005

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermal-flow patterns of m = 1 in thermocapillary liquid bridges of high aspect ratio with free-surface heat transfer2021

    • Author(s)
      Yuya Fukuda, Toru Ogasawara, Sorachi Fujimoto, Toshikazu Eguchi, Kosuke Motegi & Ichiro Ueno
    • Journal Title

      International Journal of Heat Mass Transfer

      Volume: 173, 121196 Pages: 121196-121196

    • DOI

      10.1016/j.ijheatmasstransfer.2021.121196

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Experimental study on coherent structures by particles suspended in half-zone thermocapillary liquid bridges: review2021

    • Author(s)
      Ichiro Ueno
    • Journal Title

      Fluids 6

      Volume: 105 Issue: 3 Pages: 105-105

    • DOI

      10.3390/fluids6030105

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Experimental study on multicellular structure induced by thermocapillary effect in free liquid film2022

    • Author(s)
      Tokiya Yamashita, Koki Kawazu, Takahiro Tsukahara, Kizuku Kurose and Ichiro Ueno
    • Organizer
      日本マイクログラビティ応用学会 第34回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Exploration of formation principle of particle accumulation structure (PAS) in high-aspect-ratio liquid bridge induced by thermocapillary effect2022

    • Author(s)
      Shogo Sensui, Shin Noguchi, Kizuku Kurose and Ichiro Ueno
    • Organizer
      日本マイクログラビティ応用学会 第34回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Time-dependent convection in high-aspect-ratio liquid bridge induced by thermocapillary effect2022

    • Author(s)
      Hiroyuki Kobayashi, Kizuku Kurose and Ichiro Ueno
    • Organizer
      日本マイクログラビティ応用学会 第34回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Numerical study on basic-flow patterns of thermal Marangoni convection in rectangular free liquid film2021

    • Author(s)
      Koki Kawazu, Takahiro Homma, Ichiro Ueno, Takahiro Tsukahara
    • Organizer
      2nd Asian Conference on Thermal Sciences (ACTS2)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 数値解析による矩形型自由液膜内温度差マランゴニ対流における基 本定常流の Ma・Ca 依存性2021

    • Author(s)
      川津 晃貴,本間 貴大,黒瀬 築,上野 一郎,塚原 隆裕
    • Organizer
      日本機械学会流体工学部門講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 矩形自由液膜内温度差マランゴニ対流における single-layered flow 構造とアスペクト比の関係性2021

    • Author(s)
      本間 貴大,川津 晃貴,和田 亮平,塚原 隆裕,黒瀬 築,上野 一郎
    • Organizer
      日本機械学会流体工学部門講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 自由液膜内温度差マランゴニ対流におけるアスペクト比依存性-Single-layered flow対流場構造-2021

    • Author(s)
      本間 貴大,和田 亮平,川津 晃貴,塚原 隆裕,黒瀬 築,上野 一郎
    • Organizer
      熱工学コンファレンス
    • Related Report
      2021 Research-status Report

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Published: 2020-08-03   Modified: 2024-01-30  

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