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Wall Modeling LES Approach on Smooth Wall From Low to High Reynolds Numbers

Yu Liu and Mingbo Tong
College of Aerospace and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
Abstract—A wall modeling LES approach is achieved for the smooth wall boundary layer simulation. By this method, the motions in the inner boundary layer will be modeled by a uniform wall modeling mesh using an equilibrium equation. After getting the feedback of wall shear stress from the wall-model, LES mesh will recalculate the flow field so that a low resolution mesh can be used for LES on wall bounded flow from low Reynolds number to high. Two cases, Re=3300 and 30000, are set up to verify the wall-model approach. Both cases show good agreement with the experiment or DNS result comparing to the pure LES mesh without wall modeling. The wall modeling LES approach could be used as a novel boundary layer simulation approach to avoid high computational cost.

Index Terms—wall-model, LES, smooth wall, boundary layer, Reynolds stress

Cite: Yu Liu and Mingbo Tong, "Wall Modeling LES Approach on Smooth Wall From Low to High Reynolds Numbers," Jounal of Automation and Control Engineering, Vol. 4, No. 4, pp. 309-312, August, 2016. doi: 10.18178/joace.4.4.309-312
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