Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases

Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases

Year:    2018

Communications in Computational Physics, Vol. 23 (2018), Iss. 4 : pp. 1116–1130

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.

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Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/cicp.OA-2016-0211

Communications in Computational Physics, Vol. 23 (2018), Iss. 4 : pp. 1116–1130

Published online:    2018-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    15

Keywords:    Interface-capturing lattice Boltzmann equation model wetting boundary condition surface interactions.

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