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

Qin Lou, Mo Yang & Hongtao Xu

DOI: 10.4208/cicp.OA-2016-0211

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

Published online: 2018-08

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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.

  • Keywords

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

  • AMS Subject Headings

76T10, 76M25, 76D45, 82C40

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{CiCP-23-1116, author = {Qin Lou, Mo Yang and Hongtao Xu}, title = {Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases}, journal = {Communications in Computational Physics}, year = {2018}, volume = {23}, number = {4}, pages = {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.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.OA-2016-0211}, url = {http://global-sci.org/intro/article_detail/cicp/12629.html} }
TY - JOUR T1 - Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases AU - Qin Lou, Mo Yang & Hongtao Xu 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.

Qin Lou, Mo Yang and Hongtao Xu. (2018). Wetting Boundary Condition in an Improved Lattice Boltzmann Method for Nonideal Gases. Communications in Computational Physics. 23 (4). 1116-1130. doi:10.4208/cicp.OA-2016-0211
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