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

Qin Lou, Mo Yang & Hongtao Xu

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 = {}, 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 JO - Communications in Computational Physics VL - 4 SP - 1116 EP - 1130 PY - 2018 DA - 2018/08 SN - 23 DO - http://dor.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 & Hongtao Xu. (2020). 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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