Calibration of a new very large eddy simulation(VLES)methodology for turbulent flow simulation

作     者：HAN XingSi YE TaoHong CHEN YiLiang 

作者机构：Division of Fluid Dynamics Department of Applied Mechanics Chalmers University of Technology Gothenburg SE-41296 Sweden Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230027 China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2012年第55卷第10期

页      面：1905-1914页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 082403[工学-水声工程] 08[工学] 0807[工学-动力工程及工程热物理] 0824[工学-船舶与海洋工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50936005) the National Basic Research Program of China (Grant No. 2010CB227302) 

主　　题：hybrid RANS-LES method Very Large Eddy Simulation (VLES) channel flow flow past a square cylinder 

摘      要：Following the idea of Speziale＇s Very Large Eddy Simulation （VLES） method, a new unified hybrid simulation approach was proposed which can change seamlessly from RANS （Reynolds-Averaged Navier-Stokes） to LES （Large Eddy Simulation） method depending on the numerical resolution. The model constants were calibrated in accordance with other hybrid methods. Besides being able to approach the two limits of RANS and LES, the new model also provides a proper VLES mode between the two limits, and thus can be used for a wide range of mesh resolutions. Also RANS simulation can be recovered near the wall which is similar to the Detached Eddy Simulation （DES） concept. This new methodology was implemented into Wilcox＇s κ- ω model and applications were conducted for fully developed turbulent channel flow at ReT = 395 and turbulent flow past a square cylinder at Re = 22000. Results were compared with LES predictions and other studies. The new method is found to be quite efficient in resolving large flow structures, and can predict satisfactory results on relative coarse mesh.