Investigation of Incompressible Flow with Heat Transfer Across Ribs with Different Configurations

Present work investigates the effect of geometry، size and arrangement of ribs in an air channel on the heat transfer and friction at various regimes. The obstacles include the triangular، trapezoidal، rectangular، and circular riblets. The RNG k-ε turbulence model along with SIMPLE algorithm and second-order upwind method have been used for discretization of Navier-Stokes and energy equations. The numerical solutions have been compared with their experimental and numerical counterparts. The aim of this research is analyzing the performance of various riblets at different flow conditions and the behavior of numerical scheme.