LARGE-EDDY SIMULATION OF STRATIFIED CHANNEL FLOW

An investigation of large-eddy simulation(LES) for turbulent channel f low with buoyancy effects was performed by solving the resolved incomp ressible Navier-Stokes equations under the Boussinesq approximation. T he 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 sim plified so that if can be used in the dynamic model closure. A LES cod e was developed for parallel computations by using the parallel techni que, and aas run on the Dawn-1000 parallel computer. To demonstrate th e viability and accuracy of the code, our results are compared with an d found in good agreement with available LES results.