Numerical simulation of bubble collapse and the transfer of vapor and noncondensable gas through the bubble interface using the ghost fluid method
Numerical simulation of bubble collapse and the transfer of vapor and noncondensable gas through the bubble interface using the ghost fluid method
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DOI：
10.1088/1742-6596/656/1/012021
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Y. Jinbo;K. Kobayashi;M. Watanabe;H. Takahira
中科院分区：
文献类型：
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作者：
Y. Jinbo;K. Kobayashi;M. Watanabe;H. Takahira
改进了虚流方法，使之包括了气泡在可压缩液体中溃灭时气液界面上的传热传质。这种转移是由于界面处的非平衡相变和不凝气体穿过界面的扩散。在本方法中，鬼流体的定义与保存的总质量，动量和能量，以及每个组件的质量，同时考虑跨界面的热量和质量通量的意图。气泡内的气相是蒸汽和不凝性气体的混合物，其中考虑了混合物组分之间的二元扩散。还考虑了气体在周围液体中的扩散。该方法应用于模拟可压缩液体中单个球形气泡的破裂以及跨界面的传热和传质。当存在不凝性气体时，由于蒸汽冷凝，其聚集在界面附近，从而防止进一步冷凝。这导致比没有不可凝气体的情况下更弱的气泡破裂。
The ghost fluid method is improved to include heat and mass transfer across the gas- liquid interface during the bubble collapse in a compressible liquid. This transfer is due to both nonequilibrium phase transition at the interface and diffusion of the noncondensable gas across the interface. In the present method, the ghost fluids are defined with the intention of conserving the total mass, momentum, and energy, as well as the mass of each component while considering the heat and mass fluxes across the interface. The gas phase inside the bubble is a mixture of vapor and noncondensable gas, where binary diffusion between the mixture components is taken into account. The gas diffusion in the surrounding liquid is also considered. This method is applied to a simulation of a single spherical bubble collapse with heat and mass transfer across the interface in a compressible liquid. When noncondensable gas is present, it accumulates near the interface due to vapor condensation, thereby preventing further condensation. This results in a weaker bubble collapse than the case without noncondensable gas.