S0507-2-3 縮小管内流れにおける気泡変形に関する実験的検討([S0507-2]気泡力学と界面現象(2))

概要

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The bubble deformation in a gas-liquid contraction tube flow is observed with a high-speed camera to understand the mechanism of the bubble fission in the tube. It is shown that the surface instability occurs on the tip of a large bubble above the throat, which leads to the continuous detachment of small bubbles into the throat. Two kinds of liquid jets, ie, the forward jet and the counter jet, occur on the surface of small bubble in the throat. The result shows that the forward jet becomes faster as the bubble is pinched off more upstream. The forward jet can be caused by the pressure gradient behind the bubble. The result also shows that the counter jet occurs only when the L/R is small when L is the distance between the upstream and downstream bubbles and R is the bubble radius. The counter jet is caused by the deformation due to the bubble-bubble interaction.
一般社団法人日本機械学会の論文
2010-09-04