Irreversibility aspects to flow of Sutterby fluid subject to nonlinear heat flux and Joule heating

Here we analyze mixed convective flow of Sutterby fluid with features of irreversibility and nonlinear heat flux. Effects of Joule heating and viscous dissipation are considered between two rotating disks. Two disks have variant stretching properties and angular velocities. Nonlinear system is reduced to ordinary ones through adequate transformations. Homotopy analysis method (HAM) is utilized for series solutions. Effects of various physical variables on the velocity and temperature are studied. Entropy generation and Bejan number are examined for different physical variables. Skin friction coefficient and heat transfer rate are numerically discussed. Entropy generation rate is enhanced via larger estimations of magnetic parameter and Brinkman number while opposite behavior is observed for Bejan number.