A NOVEL LESS DISSIPATION FINITE-DIFFERENCE LATTICE BOLTZMANN SCHEME FOR COMPRESSIBLE FLOWS

作者：Chen Q; Zhang X B^*

来源：International Journal of Modern Physics C, 2012, 23(11): 1250074.

DOI：10.1142/S012918311250074X

• Less dissipation
• FDLBM
• coupled DDF model
• smoothness indicator
• compressible flows

In this paper, a new smoothness indicator is proposed to improve the finite-difference lattice Boltzmann method (FDLBM). The necessary and sufficient conditions for convergence are derived. A detailed analysis reveals that the convergence order is higher than that of the previous finite-difference scheme. The coupled double distribution DDF) model is used to describe discontinuity flows and verify the improvement. Numerical simulations of compressible flows with shock wave show that the improved finite-difference lattice Boltzmann scheme is accurate and has less dissipation. The numerical results are found to be in good agreement with the analytical results and better than those of the previous scheme.

• 出版日期2012-11
• 单位南京理工大学