This work applies second law of thermodynamics
to analyse the effect of radiation on electrically conducting
couple stress fluid through a channel. A constant magnetic field
is introduced across the flow channel and the resulting Navier-
Stokes and energy equations are non-dimensionalized and
solved using Adomian decomposition method (ADM) and
differential transform method (DTM). The obtained velocity
and temperature profiles are used to calculate the entropy
generation rate and irreversibility ratio. The effects of
radiation, magnetic field and couple stress parameters on the
velocity, temperature, entropy generation rate and Bejan
number are discussed with the aid of graphs. From the study, it
is observed that increase in magnetic field and couple stress
parameters reduces the fluid velocity while an increase in
radiation parameter reduces the temperature of the fluid.
Furthermore, radiation parameter increases entropy generation
as heat transfer dominates irreversibility
