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Enhancement of liquid infiltration into closed-end holes by irradiating an acoustic wave, and its application for liquid replacement and drying

Research Project

Project/Area Number 19K04167
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionShizuoka University

Principal Investigator

Sanada Toshiyuki  静岡大学, 工学部, 教授 (50403978)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords混相流 / 音波 / 気泡 / 気液界面 / 気体排出 / 固有振動数 / 超音波 / 洗浄 / 濡れ / 乾燥
Outline of Research at the Start

小さな孔へなどの複雑な形状に対して、液体を用いて洗浄するためには、まずその孔を液体で満たす必要がある。しかし液体の表面張力によって小さな孔への液体の侵入や孔内の気体排出は通常困難が伴う。そこで本研究では、音波を使用して気液界面を振動させ、効率的に液体を侵入させる手法を開発する。さらに、ものづくりの現場の洗浄工程において、液体侵入後に重要となる、液体の置き換えや乾燥工程への音波照射の影響についての知見も得ることを目標とする。

Outline of Final Research Achievements

Filling microstructures with liquid are required in processes such as cleaning, bonding, and painting. A small hole with one end closed, especially a high aspect case, is difficult to deform the gas-liquid interface due to its surface tension, making it difficult to fill with liquid. This study achieved complete gas ejection successfully by focusing on the natural frequency of the pore's gas column using acoustic waves of multiple frequencies. We investigated the detailed ejection process, such as the gas-liquid interface oscillation, gas column splitting, re-approaching, and coalescence of the split gas columns during sound wave irradiation.

Academic Significance and Societal Importance of the Research Achievements

液体中で周囲を壁面に囲まれた気体の音波照射時における振動現象について調査した.特に音波波長が気体体積よりも大きな場合の気泡の振動と移動について調査した点において学術的に意義がある.また従来真空チャンバーなどの付加的な装置が必要であった微細構造からの気体排出現象を,液体中において音波を照射するのみで可能とした点が工業的に優位な点といえる.ものづくりの製造プロセスにおける効率化へとつながる点で社会的意義がある.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies2022

    • Author(s)
      Matsumoto Yuta、Mizushima Yuki、Sanada Toshiyuki
    • Journal Title

      Micromachines

      Volume: 13 Issue: 1 Pages: 109-109

    • DOI

      10.3390/mi13010109

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enhancement of Gas Discharge from a Closed End Hole by Using Acoustic Wave Irradiation2020

    • Author(s)
      古谷 勇貴, 水嶋 祐基, 渡部 正夫, 真田 俊之
    • Journal Title

      JAPANESE JOURNAL OF MULTIPHASE FLOW

      Volume: 34 Issue: 1 Pages: 111-117

    • DOI

      10.3811/jjmf.2020.010

    • NAID

      130007827290

    • ISSN
      0914-2843, 1881-5790
    • Year and Date
      2020-03-15
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 異なる周波数の音波照射による閉端孔からの気体排出2021

    • Author(s)
      松本悠汰,水嶋祐基,渡部正夫,真田俊之
    • Organizer
      日本混相流シンポジウム2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 音波照射による液体中での閉端孔内気体振動およびその排出現象2021

    • Author(s)
      松本悠汰,水嶋祐基,渡部正夫,真田俊之
    • Organizer
      日本機械学会第99期流体工学部門講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 音波照射による液体中の気柱振動およびその排出現象2020

    • Author(s)
      真田俊之,水嶋祐基,渡部正夫
    • Organizer
      日本機械学会第98期流体工学部門講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Gas column oscillation inside a closed-end hole and its expelling by irradiating an acoustic wave2020

    • Author(s)
      T. Sanada, Y. Mizushima, M. Watanabe
    • Organizer
      The 73rd Annual Meeting of the APS Division of Fluid Dynamics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] A model for gas column oscillation inside a hole by irradiating an acoustic wave2019

    • Author(s)
      Yuki Furuya, Toshiyuki Sanada, Masao Watanabe
    • Organizer
      ASME-JSME-KSME 2019 Joint Fluids Engineering Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 音波照射による閉端円管からの気体排出促進2019

    • Author(s)
      古谷勇貴, 水嶋 祐基, 渡部 正夫, 真田 俊之
    • Organizer
      混相流シンポジウム2019
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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