1313 せん断流れ場ならびに重力場が気泡の成長・離脱に及ぼす影響(GS-5 混相流)

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We have simulated the bubble growth and detachment in a shear flow under several gravity conditions using the three-dimensional level set method considering the high-density ratio of two fluids and the surface tension. The gas is injected through a small opening into the liquid. We have solved the flow inside the small opening in addition to the main shear flow. We have succeeded in simulating a bubble detachment. It is shown that the bubble growth and detachment were influenced by the strength of shear and gravity acceleration. When the shear was strong, the bubble was elongated and leaned downward and was finally pinched off due to the interface instability. The larger the gravity acceleration became, the earlier the bubble detached.
一般社団法人日本機械学会の論文
2004-03-17