Enhanced lattice Bhatnagar-Gross-Krook method
for fluid dynamics simulation
Enhanced lattice Bhatnagar-Gross-Krook method
for fluid dynamics simulation
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.
Karlin, Ilya
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Lycett-Brown, Daniel
c719e1c9-d449-41f7-ab3a-66b0ca2ba0bc
Luo, Kai H.
86f52a13-fdcd-40e4-8344-a6fe47c4e16b
Karlin, Ilya
3ffca333-7433-41f0-a7e1-2fdb91ddb41a
Lycett-Brown, Daniel
c719e1c9-d449-41f7-ab3a-66b0ca2ba0bc
Luo, Kai H.
86f52a13-fdcd-40e4-8344-a6fe47c4e16b
Karlin, Ilya, Lycett-Brown, Daniel and Luo, Kai H.
(2011)
Enhanced lattice Bhatnagar-Gross-Krook method
for fluid dynamics simulation.
Physical Review E.
(Submitted)
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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Submitted date: 11 March 2011
Identifiers
Local EPrints ID: 192145
URI: http://eprints.soton.ac.uk/id/eprint/192145
ISSN: 1539-3755
PURE UUID: d037d920-909c-4e73-b489-2e2e0ea2ad8b
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Date deposited: 30 Jun 2011 10:26
Last modified: 14 Mar 2024 03:49
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Contributors
Author:
Ilya Karlin
Author:
Daniel Lycett-Brown
Author:
Kai H. Luo
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