Conjugate heat transfer analysis in a ribbed channel

Numerical Simulations are performed to analyze the conjugate heat transfer of turbulent flow in a ribbed channel with conducting solid wall. An immersed boundary method is used to figure out the heat transfer effect in the solid region on that in the fluid region in an unitary computational domain. In order to satisfy the continuity of the heat flux at the solid-fluid interface, an effective conductivity is introduced. A large eddy simulation technique is used to predict turbulent flow. Results show that heat flux is concentrated to the rib below the channel wall and flows outward mainly around the edge of the rib. However, the local Nusselt number shows no significant difference with the pure convection case