Turbulent Rayleigh-Bénard convection flow simulation using a multi-relaxation-time lattice Boltzmann method on non-uniform grids

Rayleigh–Bénard convection is a fundamental phenomenon found in many atmospheric and industrial applications. Many numerical methods have been applied to analyze this problem, including the lattice Boltzmann method, which has emerged as one of the most powerful computational fluid dynamics methods in recent years. Using a multi relaxation time lattice Boltzmann method (MRT LBM) with both Smagorinsky and mixed scale viscosity sub-grid closure models on non-uniform grids, this study investigates the two-dimensional Rayleigh–Bénard problem for different Rayleigh numbers in ranging 108 to 1015 with a Prantdl number of 0.71.The simulation results show that lattice Boltzmann method is capable to simulate turbulent convection flow problems

کلیدواژه ها:

MRT LBM ، large eddy simulation (LES) ، Rayleigh-Bénard convection ، non-uniform grid