Simulation of 2D Cavitation Bubble Growth Under Shear Flow by Lattice Boltzmann Model
Simulation of 2D Cavitation Bubble Growth Under Shear Flow by Lattice Boltzmann Model
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DOI：
10.4208/cicp.2009.09.015
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发表时间：
2010-01-01
影响因子：
3.7
通讯作者：
Chen, Xiaopeng
中科院分区：
文献类型：
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作者：
Chen, Xiaopeng
自然空化被定义为由于压力福尔斯低于液体的蒸气压而在流中形成蒸气泡的现象。空化泡的初生受到杂质、湍流、液体热物性等多种因素的影响。本文采用单组分多相格子Boltzmann模型（SCMP LBM）模拟了剪切流作用下初生阶段二维空化泡的生长过程。假设了一个经验边界条件敏感的二维气泡生长速率，R类似于e（t）。并对不同剪切速率下的气泡行为进行了比较。结果表明，空化泡的变形与液滴理论基本一致，空化泡的生长随剪切速率的增大而略有减小。
Natural cavitation is defined as the phenomenon of the formation of vapor bubbles in a flow due to the pressure falls below the liquid's vapor pressure. The inception of the cavitation bubble is influenced by many factors, such as impurities, turbulence, liquid thermal properties etc. In this paper, we simulate a 2D cavitation "bubble" growth under shear flow in the inception stage by Single-Component-Multiphase Lattice Boltzmann Model (SCMP LBM). An empirical boundary condition sensitive 2D bubble growth rate, R similar to e(t), is postulated. Furthermore, the comparison is conducted for bubble behavior under different shear rates. The results show that the cavitation bubble deformation is coincident with prior droplet theories and the bubble growth decreases slightly with the flow shear rate.