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首页> 外文期刊>International journal of computational methods >A POD-Based Variational Multiscale Method for Large Eddy Simulation of Turbulent Channel Flows
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A POD-Based Variational Multiscale Method for Large Eddy Simulation of Turbulent Channel Flows

机译：基于POD的变分性多尺度方法，用于湍流通道流动的大涡模拟

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摘要

A POD-based variational multiscale method (VMM) for large eddy simulation (LES) of turbulent channel flows is proposed. The incompressible Navier-Stokes equations are solved using a residual-based VMM technique, and the residual-based model coefficient is adopted from Taylor et al. [1998] "Finite element modeling of blood flow in arteries," Comput. Methods in Appl. Mech. Eng. 158(1-2), 155-196. A generalized-a method is applied for the temporal integration. Numerical results show that four or higher wallnormal modes need to be applied for reproducing most of the turbulent characteristics. Results of large vortex structures and the low velocity streaks prove that the turbulent channel flows are well estimated by the proposed approach. The statistical analysis of the turbulent velocities confirms its reliability in turbulent channel flows.
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