流体工学部門講演会講演論文集
Online ISSN : 2424-2896
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0207 気泡離脱メカニズムの表面張力支配への転換(OS2-2 混相流の多次元可視化計測,OS2 混相流の多次元可視化計測)
山本 憲小方 聡
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p. _0207-01_-_0207-02_

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The bubble departure mechanism, which in general is dominated by the buoyancy force, has been shifted to the surface tension force dominance by employing a two-dimensional saw-tooth surface. The experiment was conducted in a carbonated water pool, and spontaneously generated and detached bubbles on test walls were visualized. Consequently, three different bubble departure modes (spontaneous, double contact, and top contact) were observed, and bubble growth and departure mechanisms were analyzed in terms of instantaneous bubble diameter and surface geometry. The results showed that bubbles departed from the surface in double contact mode shaped almost perfectly spherical, which implies the departure mechanism was surface tension force dominant.
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© 2013 一般社団法人 日本機械学会
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