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基于Chapman-Enskog展开,本文提出了多尺度过程界面耦合的LBM/NS重构算子,将该重构算子用于格子-Boltzmann方法(LBM)和人工压缩方法(ACM)耦合计算中,提出了基于多尺度重构算子的LBM和ACM界面耦合方法.为检验该耦合方法,将其用于模拟双周期剪切层流动和多孔介质流体混合层流动模拟中,数值结果表明LBM与ACM耦合方法可以准确模拟非稳态流动问题和捕捉局部小尺度区域的细节流动特征.
Based on the Chapman-Enskog expansion, a LBM / NS reconstruction operator coupled with multi-scale process interface is proposed in this paper. The reconstruction operator is used in the coupling computation of lattice-Boltzmann method (LBM) and artificial compression method (ACM) The LBM and ACM interface coupling method based on multi-scale reconstruction operator is used to test this coupling method, which is used to simulate two-period shear layer flow and porous media fluid mixing layer flow simulation. Numerical results show that LBM and ACM are coupled The method can accurately simulate unsteady flow problems and capture the detail flow characteristics of local small-scale regions.