Numerical study of convective heat transfer over a rotating rough disk with uniform wall temperature

Abstract

In this paper, the laminar heat transfer over a rotating rough disk under uniform wall temperature condition is studied. The roughness is modelized with sinusoids which are concentric with respect to the axis of rotation. The boundary-layer approximation is used and the resulting equations are solved with the Keller-Cebeci method. Results are presented for air (Pr = 0.7) and for low values of the amplitude/wavelengh ratio (ao/λ>0.125).