Water Science and Engineering 2011, 4(4) 421-430 DOI:   10.3882/j.issn.1674-2370.2011.04.006  ISSN: 1674-2370 CN: 32-1785/TV

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large eddy simulation (LES)
turbulent boundary layer
flow separation
LU -jun
WANG Ling-ling
HAI -zhu
ZHEN Zhen-yu
Article by Lu,.J
Article by Wang,L.L
Article by Hai,.Z
Article by Zhen,Z.Y

Large eddy simulation of water flow over series of dunes

Jun LU1, 2, Ling-ling WANG*1, Hai ZHU1, Hui-chao DAI1

1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China

2. Zhangjiagang Water Conservancy Bureau, Zhangjiagang 215600, P. R. China  


Large eddy simulation was used to investigate the spatial development of open channel flow over a series of dunes. The three-dimensional filtered Navier-Stokes (N-S) equations were numerically solved with the fractional-step method in sigma coordinates. The subgrid-scale turbulent stress was modeled with a dynamic coherent eddy viscosity model proposed by the authors. The computed velocity profiles are in good agreement with the available experimental results. The mean velocity and the turbulent Reynolds stress affected by a series of dune-shaped structures were compared and analyzed. The variation of turbulence statistics along the flow direction affected by the wavy bottom roughness has been studied. The turbulent boundary layer in a complex geographic environment can be simulated well with the proposed large eddy simulation (LES) model.

Keywords large eddy simulation (LES)   dunes   turbulent boundary layer   flow separation  
Received 2011-01-07 Revised 2011-08-20 Online: 2011-12-30 
DOI: 10.3882/j.issn.1674-2370.2011.04.006

This work was supported by the National Natural Science Foundation of China (Grant No. 51179058), the National Science Fund for Distinguished Young Scholars (Grants No. 51125034 and 50925932), the Special Fund for Public Welfare of the Water Resources Ministry of China (Grant No. 201201017), and the 111 Project (Grant No. B12032).

Corresponding Authors: Ling-ling WANG
Email: wanglingling@hhu.edu.cn
About author:


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