Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases
Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases
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DOI：
10.4208/cicp.oa-2016-0211
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发表时间：
2018
影响因子：
3.7
通讯作者：
Q. Lou;Mo Yang;Hongtao Xu
中科院分区：
文献类型：
--
作者：
Q. Lou;Mo Yang;Hongtao Xu
基于界面捕获格子Boltzmann方程模型，发展了一种模拟润湿表面流体行为的数值方法[Q。Lou和Z. Guo，Phys.Rev.E91，013302（2015）]，其尚未应用于润湿问题。与建议的数值方案，虚假密度附近的固体表面，可以消除和广泛的平衡接触角也可以重现。此外，作为模拟参数的固体表面上的平衡接触角可以根据润湿性预先给出。通过对液滴在光滑表面上的扩散和毛细侵入的动力学行为的数值试验，表明该数值格式能够有效地消除固体表面附近的伪密度。AMS科目分类：76T10、76M25、76D45、82C40
A numerical scheme capable of modeling fluid behavior on wetting surfaces is developed based on an interface-capturing lattice Boltzmann equation model [Q. Lou and Z. Guo, Phys. Rev. E 91,013302 (2015)], which has not yet been applied to wetting problems. With the proposed numerical scheme, the spurious densities near the solid surfaces can be eliminated and a wide range of equilibrium contact angles can also be reproduced. Further, the equilibrium contact angle on the solid surface, as a simulation parameter, can be given in advance according to the wettability. Numerical tests, including the dynamics behavior of a liquid drop spreading on a smooth surface and the capillary intrusion, demonstrate that the proposed numerical scheme performs well and can eliminate the spurious densities near the solid surface. AMS subject classifications: 76T10, 76M25, 76D45, 82C40