球下端に付着した液滴の落下体積(熱工学,内燃機関,動力など) Volume of Liquid Droplet Detaching from a Sphere(Thermal Engineering)

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A theoretical and experimental study is conducted to investigate the detached volume from the pendant drop on sphere surface. From the observation of droplet detachment by use of a high speed video camera, the movement of upper part from the neck of droplet is quite slow compared with that of detaching lower part. The surface profile of upper part was calculated approximately as a static problem by using the axi-symmetric Laplace equation. Using the droplet profile, the system energy was calculated including the work done by the solid-liquid wetting behavior. Based on the condition of energy minimum, the volume of upper part was determined among the solutions satisfying the boundary conditions and the volume of detached part V was calculated. The volume V increases with the sphere diameter and approaches to that for the plate. V is strongly dependent on the wettability between sphere and liquid, and decreases with the receding contact angle. The detached volume of water droplet was measured for spheres of porous brick with various diameters. The results agreed well with theoretical ones obtained in this study.

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  • 日本機械学会論文集 B編

    日本機械学会論文集 B編 75(755), 1503-1509, 2009

    一般社団法人 日本機械学会

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各種コード

  • NII論文ID(NAID)
    110007339831
  • NII書誌ID(NCID)
    AN00187441
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03875016
  • NDL 記事登録ID
    10388406
  • NDL 雑誌分類
    ZN11(科学技術--機械工学・工業)
  • NDL 請求記号
    Z16-109
  • データ提供元
    CJP書誌  NDL  NII-ELS  J-STAGE 
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