Large Eddy Simulation of conjugate heat-transfer using thermal wall-functions

Large Eddy Simulations of a passive scalar were done using wall-functions for both wall-friction and wall heat flux on the plane channel flow configuration with solid walls. Conjugate heat-transfer simulations have been carried out at low (Re-T - 150) and high (Re-T = 395) Reynolds numbers using a wall-function strategy. Attention was not only paid on the temperature fluctuations in the fluid and inside the solid wall, but also on the temperature signal spectrum inside the solid as well as in the first off wall point in the fluid. The main purpose of this work is intended to stress on the misleading effects (especially when focusing on temperature fluctuations) of wall-function type meshes in the fluid-solid thermal interaction frame-work.