Zonal Embedded Grids for LES of Self-Sustaining Structures of Wall Turbulence

• Published in: Tsinghua science and technology Vol. 15; no. 5; pp. 555 - 560
• Main Author: 李玲 苑明顺 李全明
• Format: Journal Article
• Language: English; Chinese
• Published: Elsevier Ltd 01.10.2010
• Subjects: Computational fluid dynamics; Computer simulation; finite volume method; Fluid flow; large eddy simulation; Mathematical models; Reynolds number; Turbulence; Turbulent flow; wall turbulence; Walls; weakly compressible flow; zonal grid refinement; 分区网格; 加密方法; 壁湍流; 嵌入式; 有限体积法; 涡结构; 湍流结构; weakly compressible flow; zonal grid refinement; large eddy simulation; wall turbulence; finite volume method
• ISSN: 1007-0214; 1878-7606; 1007-0214
• DOI: 10.1016/S1007-0214(10)70100-0

In this study,a zonal grid refinement method based on the solution of weakly compressible flow equations with large eddy simulation in the finite volume method（FVM） and dynamic subgrid-scale model framework was used to simulate the turbulence structures of a plane-wall flow with Reynolds number Re=U0δ /ν =10 000.Comparison and analysis were conducted on the distributions of time-averaged velocity and velocity fluctuations,as well as on the actual near-wall structures,to verify the accuracy of the turbulence features that were simulated using the zonal grid refinement method.The results show that the zonal embedded grid is a very efficient way to illustrate the turbulence structures of the near-wall region.The present method is easy to implement and extend to small Mach number flow modeling on a collocated irregular FVM mesh system.