| In this thesis, the effects of the Coriolis force on the turbulent thermal flow field in a heated channel subjected to spanwise system rotation are thoroughly investigated using the method of large-eddy simulation (LES). Both the general and simplified transport equations for the resolved turbulent stresses are presented, which are essential for understanding the unique pattern of turbulent kinetic energy production in a rotating system. The observation of quasi-periodicity of the drag coefficient and Nusselt number in the spanwise direction induced by Taylor-Gortler vortices is reported. The physical conditions under which the extrema of the drag coefficient and Nusselt number occur are investigated.;Numerical simulations are performed primarily using two dynamic subgrid-scale stress models and one dynamic subgrid-scale heat flux model; namely, the conventional dynamic model (DM) and a novel dynamic nonlinear model (DNM) for closure of the filtered momentum equation, and an advanced dynamic full linear tensor thermal diffusivity model (DFLTDM) for closure of the filtered thermal energy equation. The turbulent flow field studied in this research is characterized by a Reynolds number Retau = 150 and various rotation numbers Rotau ranging from 0 to 7.5. In order to validate the LES approach, statistics of the velocity and temperature fields obtained from the simulations are thoroughly compared with the available experimental and direct numerical simulation (DNS) results. |
