Dynamic Wetting and Advancing Contact Angles in Horizontal Capillary Tubes

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The kinetics of steady dynamic wetting of a liquid replacing a gas saturated with the liquid vapor on smooth solid surface in horizontal capillary tubes is investigated theoretically and experimentally. An approximate analytical method for advancing the dynamic meniscus of the liquids is proposed, and the effects of liquid flow, equilibrium contact angle, and adsorbed layer thickness at the gas-solid interface are studied. The analytical results show that dynamic wetting depends on liquid flow near the contact line, and the effect of the liquid flow far from there is insignificant. Furthermore, it is found that the dynamic contact angle is a function of not only capillary number, but also equilibrium contact angle, and adsorbed layer thickness. Experiments were carried out on dynamic wetting of hexane, octane and butanol in polytetrafluoroethylene tubes. The experimental data of dynamic contact angle in the present and previous studies are in fairly good agreement with the theoretical predictions over wide ranges of capillary numbers and equilibrium contact angles.

収録刊行物

  • Journal of chemical engineering of Japan  

    Journal of chemical engineering of Japan 31(6), pp.914-921, 1998-12-01 

    The Society of Chemical Engineers, Japan

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各種コード

  • NII論文ID(NAID)
    10002066682
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    1523615
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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