Temperature distribution, local and total entropy generation analyses in MHD porous channels with thick walls

摘要: Abstract Entropy generation rate is an important characteristic of a thermal system. This work aims to study the temperature distribution, and local total entropy rates within horizontal porous channel under uniform magnetic field with thick walls. The conductivity walls are considered temperature-dependent viscous dissipation effects incorporated into energy equation. Two types boundary conditions employed: Case one which has constant but different two heat flux condition on lower wall convective upper wall. Using combined analytical-numerical solution procedure fields obtained. Thereafter, achieved. correctness technique checked against completely analytical solution, for cases temperature-independent conductivities After validation, general procedure, i.e., conductivities, used investigate effect various parameters such as Brinkman number, Hartmann Darcy medium solid parts ratio, etc. rates. As interesting result it was found that depending channel, ratio may increase or decrease rate.