CORRECTIONS TO THE COLLISION TERM IN THE BGK BOLTZMANN EQUATION |
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| Authors: | Feng Shi-de Ren Rong-cai Cui Xiao-peng Ji Zhong-zhen |
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| Affiliation: | State Key Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | With the discrete method of the hexagonal cell and three different velocities of particle population in each cell, a two-dimensional lattice Boltzmann model is developed in this paper.[1,2] The collision operator in the Boltzmann equation is expanded to fourth order using the Taylor expansion.[3,4] With this model, good results have been obtained from the numerical simulation of the reflection phenomenon of the shock wave on the surface of an obstacle, and the numerical stability is also good. Thus the applicability of the D2Q 19 model is verified. |
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| Keywords: | lattice Boltzmann model collision operator shock wave |
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