Simulation of thermally developing laminar flow in partially flled porous pipes under wall suction

This study numerically investigates fluid flow and heat transfer enhancement of a two-dimensional developing laminar flow in an axisymmetric pipe with partially flled porous material attached to the wall. The efects of porous layer in the range of 0 =R A critical value of the porous layer thickness exists at which the Nusselt number value reaches the minimum. As the porous layer is thickening, more uid is pushed towards the middle of the pipe and less uid goes through the porous layer in comparison with the case that the porous layer is located in the center. In this case, the heat convection is reduced relative to heat conduction due to the physical contact between the solid matrix and the wall surface.