基于LBM的槽道流直接数值模拟

On Feasibility of Direct Numerical Simulation of Channel Flow Based on LBM(Lattice Boltzmann Method)

采用格子波尔兹曼方法(Lattice Boltzmann Method,LBM),进行了槽道流动的直接数值模拟。与经典的KMM结果比较了边界层速度型、均方根速度、雷诺应力分布以及槽道流中心区的能谱,结果表明LBM具有足够的精度模拟边界层的发展以及壁面存在对流动的影响。文中的研究表明,LBM有望用于风洞洞壁干扰的数值模拟修正。

Aim. The introduction of the full paper reviews Refs. 1,2 and 3 and then proposes exploring the feasibility of direct numerical simulation; the answer, we believe, is afiSrmative 1, 2 and 3. Their core is that the numerical simulation results of the bo according undary to our presentation in sections layer velocity profile, the mean square root velocity, the Reynolds stress profile and the energy spectrum in the central channel zone display satisfactory agreements respectively with the Kim, Moin and Moser＇ s classical results in Ref. 5 ; their corresponding figures are： Fig. 4 （the boundary layer velocity profile）, Fig. 5 （the mean square root velocity）, Fig. 6 （the Reynolds stress profile） and Fig. 7 （the energy spectrum in the central channel zone）. The agreements indicate preliminarily that the LBM can indeed predict the evolution of boundary thus demonstrating that the LBM can be applied to the correction layer and the effect of wind tunnel wall on flow, of wind tunnel wall interference.