Numerical simulation of heat transfer in rotating smooth square ducts using modified k-ω turbulence model

A three-dimensional Navier-Stokes code with modified k-ε, k-ω(with new terms for Coriolis and rotational buoyancy) and standard k-ω turbulence models were used for prediction of flow and heat transfer characteristics for a rotating smooth square channel with radially outward flow. Comparisons between the calculation results of using different turbulence models were made with experimental data, test case is the rotation number (based on the inlet velocity and rotation speed) Ro=0.24; Reynolds number (based on the inlet velocity) Re=25000. The numerical results reveal that the heat transfer predictions have great discrepancy by using different turbulence models. For the present test case, the numerical results of using modified k-ω turbulence model give predictions that are in better agreement with the experimental data than using modified k-ε turbulence model and standard k-ω turbulence model.