Authors : K. Al-Farhany and Ammar Abdulkadhim
Abstract: Natural convection heat transfer in a porous rectangular partially active heated wall is numerically investigated using finite element method. Three different cases of heating and cooling zone had been taken in the consideration along the vertical walls while the others are considered to be adiabatic. The governing equations are obtained by the applying of Darcy Model and Boussinesq approximation. Finite element method is used to solve the dimensionless governing equations with the specified boundary conditions. The investigated parameters in the present study are the modified Rayleigh number (10 •Ra • 103), aspect ratio (0.5 • A• 2), finite wall thickness (0.02 • D•= 0.5) and the thermal conductivity ratio (0.1• Kr • 10). The results are presented in terms of streamlines, isotherms and Nusselt number. The results indicate that as the aspect ratio, finite wall thickness increase, Nusselt number decrease. Also, as the modified Rayleigh number increases, the Nusselt number will increase. Case 1 and 2 gave approximately the same effects of heat transfer rate while case 3 give lower rate of heat transfer rate.
K. Al-Farhany and Ammar Abdulkadhim, 2018. Numerical Simulation for Conjugate Natural Convection in a Partially Heated Rectangular Porous Cavity. Journal of Engineering and Applied Sciences, 13: 6823-6832.