K-1439 微小重力変動場における円盤状の気泡の挙動に関する3次元数値解析(S16-4 キャビテーションおよび気液系流れのダイナミクス(4))(S16 キャビテーションおよび気液系流れのダイナミクス)

概要

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One of the open problems in a microgravity field is an effect of g-jitter on physical phenomena. In this paper, we investigate the motion of an air bubble in a shallow cell that contains a mixture of air and water under oscillatory microgravity fields. To simulate the g-jitter effect on the air bubble we use the Level-Set method that is based on an Eulerian formulation and describes the interface by the zero level of a Lipschitz-continuous function. We analyze the influence of the gas volume ratio and the boundary condition of contact point on the bubble motion. The results show that the smaller the gas volume ratio becomes, the larger the amplitude of the bubble translation becomes. When the contact angle is fixed, the motion of a three-dimensional bubble is similar to that of a two-dimensional bubble.
一般社団法人日本機械学会の論文
2001-08-22