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所属单位：航空学院

发表刊物：NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS

关键字：LATTICE BOLTZMANN METHOD INVISCID COMPRESSIBLE FLOWS NATURAL-CONVECTION FLUX SOLVER BGK SCHEME CUBIC CAVITY VISCOUS-FLOW NUMERICAL-SIMULATION ENCLOSURE MODEL

摘要：In this work, a simple gas kinetic scheme is presented for solving the 3D incompressible thermal flow problems. In the scheme, the macroscopic-governing equations are discretized by finite volume method, and the numerical fluxes at cell interface are reconstructed by the local solution of the Boltzmann equation. To compute the numerical fluxes, two equilibrium distribution functions are introduced. One is the sphere function for calculating the fluxes of mass and momentum equations, and the other is the D3Q6 discrete velocity model for evaluating the flux of energy equation. Using the difference of equilibrium distribution functions at the cell interface and its surrounding points to approximate the nonequilibrium distribution function, and at the same time considering the incompressible limit, the numerical fluxes of macroscopic governing equations at the cell interface can be given explicitly and concisely. Numerical results showed that the present scheme can predict accurately the thermal flow properties at a wide range of the Rayleigh numbers.

ISSN号：1040-7790

是否译文：否

发表时间：2017-01-01

合写作者：Yang, L. M.,Shu, C.,Yang, W. M.

通讯作者：Shu, C.,吴杰