Entropy generation and irreversibility analysis of slip flow in porous microchannel affected by electromagnetic field

This article provided an analytical study of entropy generation and irreversibility for gaseous flow inside long planar porous-microchannel placed in electromagnetic field. Analytical expressions of total rate of entropy generation and irreversibility were provided. Effects of different parameters in entropy generation and irreversibility were investigated. This study also presented numerical results that were used as validation for the present study. The obtained results showed that rate of total entropy generation increases as Darcy number and electrical conductivity increase but decreases as porosity or thermal conductivity ratio increase. The average Bejan number increases with increasing Darcy number but decreases as Hartmann number increases. The irreversibility ratio increases as Darcy number, electric-magnetic field ratio increases but decreases as Harmann number or porosity increase. The effect of porous medium on entropy generation was smaller than electromagnetic field effect.