Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7155904 | Computers & Fluids | 2018 | 9 Pages |
Abstract
Multi-component lattice Boltzmann models operating in a wide range of fluid viscosity values are developed and examined. The algorithm is constructed with the goal to enable engineering applications without sacrificing simplicity and computational efficiency present in the original Shan-Chen model and D3Q19 lattice scheme. Boundary conditions for modeling friction and wettability effects are developed for discrete representation of surfaces within a volumetric approach, which results in accurate flow simulation in complex geometry. Numerical validation of our models includes comparison to previous studies and analytical solutions. The results are shown to be robust and accurate up to an extremely small kinematic viscosity value of 0.0017 lattice units and the extremely high ratio of components' kinematic viscosities of hundreds and up to a thousand. This improvement is significant compared to previous studies with Shan-Chen model [1,25,26], in which reasonable accuracy was kept only at the viscosity ratio up to 10 in the Poiseuille flow and the fingering simulation.
Related Topics
Physical Sciences and Engineering
Engineering
Computational Mechanics
Authors
Hiroshi Otomo, Bernd Crouse, Marco Dressler, David M. Freed, Ilya Staroselsky, Raoyang Zhang, Hudong Chen,