1445 3 圧力 2 流体モデルに基づく気泡流中の波動の解析

概要

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The wave propagation in a bubbly liquid is theoretically and numerically studied with a two-fluid and three-pressure model of averaged equations for two-phase bubbly flow. A surface average pressure at the bubble wall is introduced in addition to the volume average pressures for gas and liquid phases so as to deal with the local high pressure caused by the cavitation bubble collapse in high-speed bubbly flows. The compressibility of liquid is taken into account, while the viscosity and Reynolds stress of each phase and the phase change at the interface are neglected. It is shown that another mode of wave propagation is brought about from the compressibility of liquid. The wave propagation speed approaches the sound speed of liquid with the decrease of the void fraction, although the classical isothermal equilibrium sound speed diverges in the limit of the void fraction to zero.
一般社団法人日本機械学会の論文
2003-08-05