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High-Order Discontinuous Galerkin Solution of Compressible Flows with a Hybrid Lattice Boltzmann Flux

High-Order Discontinuous Galerkin Solution of Compressible Flows with a Hybrid Lattice Boltzmann Flux
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摘要 A discontinuous Galerkin(DG)-based lattice Boltzmann method is employed to solve the Euler and Navier-Stokes equations.Instead of adopting the widely used local Lax-Friedrichs flux and Roe Flux etc.,a hybrid lattice Boltzmann flux solver(LBFS)is employed to evaluate the inviscid flux across the cell interfaces.The main advantage of the hybrid LBFS is its flexibility for capturing both strong shocks and thin boundary layers through introducing a function which varies from zero to one to control the artificial viscosity.Numerical results indicate that the hybrid lattice Boltzmann flux solver behaves very well combining with the high-order DG method when simulating both inviscid and viscous flows. A discontinuous Galerkin(DG)-based lattice Boltzmann method is employed to solve the Euler and Navier-Stokes equations.Instead of adopting the widely used local Lax-Friedrichs flux and Roe Flux etc.,a hybrid lattice Boltzmann flux solver(LBFS)is employed to evaluate the inviscid flux across the cell interfaces.The main advantage of the hybrid LBFS is its flexibility for capturing both strong shocks and thin boundary layers through introducing a function which varies from zero to one to control the artificial viscosity.Numerical results indicate that the hybrid lattice Boltzmann flux solver behaves very well combining with the high-order DG method when simulating both inviscid and viscous flows.
作者 Sun Yongcheng Cai Junwei Qin Wanglong Sun Yongcheng;Cai Junwei;Qin Wanglong(the 28th research institute of china electronics technology group corporation, Nanjing 210007, P. N. China)
机构地区 The
出处 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2018年第3期413-422,共10页 南京航空航天大学学报(英文版)
关键词 hybrid lattice Boltzmann flux solver discontinuous Galerkin(DG)method Euler equations Navier-Stokes equations hybrid lattice Boltzmann flux solver discontinuous Galerkin(DG)method Euler equations Navier-Stokes equations
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