We study heat transfer and fluid flow in a complex enclosure fiLled with porous media, with SIMPLEC (Semi-Implicit Method for Pressure Linked Equations Consistent) algorithm in curvilinear coordinates. The upper and lower walls of the enclosure are horizontal and adiabatic. The vertical wall forms cosine curve and is kept at a constant temperature. Governing equations are discretized with a finite-volume method on body-fitted coLlocated grids. Brinkman-extended-Darey model and local thermal non-equilibrium model are used to solve momentum and energy equations. Effects of parameters, such as Rayleigh numbers, Darey numbers and porosity, on heat transfer and fluid flow are studied. It is shown that Rayleigh numbers and Darey numbers have significant effect while porosity is negligible. There exists an optimal aspect ratio to make the heat transfer rate maximum.

Periodically fully developed convective heat transfer characteristics in a two-dimensional wavy channel are investigated numerically with a constant wall temperature.The calculations are performed with Pr=0.7,Re=20~500 on non-orthogonal non-staggered grids generated by an elliptic equation system.A semi-implicit method for pressure linked equations revised (SIMPLER) algorithm in curvilinear body-fitted coordinates is employed.Effects of Reynolds number and geometric parameters,such as aspect ratio φ and shape ratio γ,on heat transfer and friction factor are studied.It shows that no recirculation region occurs through the whole channel at low Reynolds numbers,small aspect ratio or small shape ratio.With the increase of Reynolds number,aspect ratio or shape ratio,heat transfer is enhanced due to flow recirculation.Corresponding friction factor increases simultaneously.