Coarse resolution large-eddy simulation of turbulent channel flows

In this paper two important factors - the subgrid model length scale and la teral resolution - are investigated for the large-eddy simulation (LES) of high Reynolds number turbulent channel flow, using resolutions that are ins ufficient to fully resolve the buffer layer. It is found that the use of st andard de,using functions will not reproduce connect wean velocity profiles and that good LES results will only be obtained by adjustment of the subgr id model length scales. To also obtain accurate turbulence statistics then special attention Ras to be given to the lateral resolution.