2021 Fiscal Year Final Research Report
Enhancement of liquid infiltration into closed-end holes by irradiating an acoustic wave, and its application for liquid replacement and drying
Project/Area Number |
19K04167
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 19010:Fluid engineering-related
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Research Institution | Shizuoka University |
Principal Investigator |
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 混相流 / 音波 / 気泡 / 気液界面 |
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.
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Free Research Field |
流体工学
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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.
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