Entropy generation of magnetohydrodynamic pulsating flow of micropolar nanofluid in a porous channel through Cattaneo–Christov heat flux model with Brownian motion, thermophoresis and heat source/sink

Abstract

The current article is to address the entropy generation on pulsating hydromagnetic flow of a micropolar nanofluid in a porous channel with the effects of Cattaneo–Christov heat flux and Buongiorno nanofluid model. This model is significant in the field of pressure surges, food processing systems, biomedical engineering, cancer therapeutic, artificial kidney, brain tumors, and nano-drug delivery in the arteries. The governing partial differential equations are converted into the system of ordinary differential equations by deploying the perturbation process then solved numerically by employing the fourth-order Runge–Kutta scheme with the support of the shooting technique. The flow variables like velocity, microrotation, temperature, nanoparticle concentration, entropy generation, and Bejan number are graphically depicted for different values of physical parameters. The heat transfer and mass transfer rates are displayed through a table. The velocity is diminishing with the enhancement of coupling parameter and Hartmann number. The temperature of nanofluid is increasing with the rising values of thermal radiation, Brownian motion, thermophoresis, and heat source while it is reduced with an enhancement of magnetic field, thermal relaxation time, and heat sink parameter. The total entropy generation is diminished by increasing the values of Hartmann number and Brownian motion.