TY - JOUR T1 - Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases JO - Communications in Computational Physics VL - 4 SP - 1116 EP - 1130 PY - 2018 DA - 2018/08 SN - 23 DO - http://doi.org/10.4208/cicp.OA-2016-0211 UR - https://global-sci.org/intro/article_detail/cicp/12629.html KW - Interface-capturing lattice Boltzmann equation model, wetting boundary condition, surface interactions. AB -

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.