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arXiv · 1107.3309

Enhanced lattice Bhatnagar-Gross-Krook method for fluid dynamics simulation

I. V. Karlin·D. Lycett-Brown·K. H. Luo
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Abstract

A generalization of the lattice Bhatnagar-Gross-Krook (LBGK) model for the simulation of hydrodynamics is presented, which takes into account the difference and the frame-independence of the relaxation of non-hydrodynamic modes. The present model retains the computationally efficient standard LBGK form with the generalized equilibrium explicitly derived. The two-dimensional realization on the standard lattice is discussed in detail. Performance of the model is assessed through a shear layer simulation and enhanced stability and accuracy with respect to the standard LBGK are reported. The results demonstrate that the present model is a useful upgrade of the standard LBGK without compromising its computational efficiency and accuracy.

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I. V. Karlin, D. Lycett-Brown, K. H. Luo. 2011-07-17. Enhanced lattice Bhatnagar-Gross-Krook method for fluid dynamics simulation. https://arxiv.org/abs/1107.3309

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