Multi relaxation time lattice Boltzmann simulations of deep lid driven cavity flows at different aspect ratios
作者： Li-Song Lin , Yi-Cheng Chen , Chao-An Lin
DOI: 10.1016/J.COMPFLUID.2010.12.012
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摘要: Abstract In this paper, the multi relaxation time (MRT) lattice Boltzmann equation (LBE) was used to compute lid driven cavity flows at different Reynolds numbers (100–7500) and aspect ratios (1–4 width depth). Steady solutions were obtained for square flows, however deep 1.5 4 depth, unsteady prevail Re = 7500, where periodic flow exists manifested by rapid changes of shapes locations corner vortices in strong contrast stationary primary vortex. The merger bottom into a vortex reemergence as number increases are more evident flows. For four depth cavity, predicted MRT model beyond 1000, which not previous single (SRT) BGK LBE model, verified complementary Navier–Stokes simulations. Also, is suitable parallel computations than its counterpart, due intense local procedure.
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