LES of turbulent heat transfer in couette channel flow using dynamic SGS models (Q979544)

Summary: The present paper documents a Large Eddy Simulation of thermal transport in turbulent Couette flow with a constant wall temperature difference. A local formulation of a dynamic eddy viscosity model is used to model the subgrid-scale stress (SGS), while the SGS heat flux is calculated two ways: using the dynamic eddy viscosity and a constant SGS Prandtl number; and using a second dynamic formulation for the SGS Prandtl number. Both simulations capture important features of the temperature field, although some small differences exist. Implementation of the dynamic SGS Prandtl number in a local formulation required extreme levels of clipping to ensure numerical stability.