An investigation of large-eddy simulation(LES) for turbulent chan-nel flow with buoyancy effects was performed by solving the resolved incompress-ible Navier-Stokes equations under the Boussinesq approximation. The Smagorinskyeddy-viscosity model and Yoshizawa eddy-viscosity model were used to describe theunresolved subgrid scale (SGS) fluctuations respectively. After some numerical test-ing, the latter was further simplified so that it can be used in the dynamic modelclosure. A LES code was developed for parallel computations by using the paralleltechnique, and was run on the Dawn-1000 parallel computer. To demonstrate theviability and accuracy of the code, our results are compared with and found in goodagreement with available LES results.
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