Volume 23, Issue 4
Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases

Qin Lou ,  Mo Yang and Hongtao Xu

10.4208/cicp.OA-2016-0211

Commun. Comput. Phys., 23 (2018), pp. 1116-1130.

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  • Abstract

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.

  • History

Published online: 2018-08

  • AMS Subject Headings

76T10, 76M25, 76D45, 82C40

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