Large-eddy simulation of stratified channel flow |
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Authors: | Liu Ningyu Lu Xiyun Wang Shanwu Zhuang Lixian |
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Institution: | (1) Department of Modern Mechanics, University of Science and Technology of China, 230026 Anhui Hefei, China |
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Abstract: | An investigation of large-eddy simulation (LES) for turbulent channel flow with buoyancy effects was performed by solving
the resolved incompressible Navier-Stokes equations under the Boussinesq approximation. The Smagorinsky eddy-viscosity model
and Yoshizawa eddy-viscosity model were used to describe the unresolved subgrid scale (SGS) fluctuations respectively. After
some numerical testing, the latter was further simplified so that it can be used in the dynamic model closure. A LES code
was developed for parallel computations by using the parallel technique, and was run on the Dawn-1000 parallel computer. To
demonstrate the viability and accuracy of the code, our results are compared with and found in good agreement with available
LES results.
The project supported by the National Natural Science Foundation of China and by the Youngster Funding of Academia Sinica |
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Keywords: | turbulent flow large eddy simulation subgrid scale buoyancy |
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