长安大学环境科学与工程学院,西安,710064
网络首发:2008-09-10,
纸质出版:2008
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李彦鹏 1, 王焕然 2. 带内嵌固体的不可压缩气液两相界面流数值模拟方法[J]. 西安交通大学学报, 2008,42(9):1151-1155.
Numerical Simulation for Incompressible Gas-Liquid Two-Phase Interfacial Flows with Immersed Solid Boundaries[J]. 2008, 42(9): 1151-1155.
将水平集方法与浸没边界方法相结合
建立了一个模拟带内嵌固体的气液两相界面流的数值方法.该方法在固定的规则网格下采用水平集函数捕捉气液交界面
采用改进直接力形式的浸没边界方法处理流体与固体的相互作用.在改进的直接力格式中
基于描述流体-固体相的另一个水平集函数设计了一个速度插值算法
以计算流体与固体的相互作用力.最后
应用所提出的数值方法分别模拟了气泡和液滴撞击内嵌固体平板以及球形固体的过程
给出了液滴与气泡的变形和运动细节.数值模拟结果与已有的实验观测结果吻合较好
证明了所提出的方法的正确性.
A numerical method is presented for simulating incompressible gas-liquid two-phase interfacial flows with immersed solid combining level set method with immersed boundary method
where level set technique is employed to capture the interface of gas-liquid flow
and immersed boundary method with a modified direct forcing scheme is developed to calculate the solid-fluid interaction force in a fixed Cartesian mesh. In the direct forcing scheme
an interpolation procedure is designed to evaluate the boundary force on the solid surface or inside the solid. Three different interfacial motion problems of bubble and droplet impacting onto a flat surface or solid sphere immersed in fluid are simulated. The details of the impacting process
such as spreading
recoiling of droplet or penetrating of bubble
are provided. The simulated results qualitatively coincide with the reported experimental observations
verifying the feasibility of the method.
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