Abstract
Present research addresses entropy generation in unsteady flow of viscous material. Flow by a stretchable rotating disk is examined. Applied magnetic field is considered. Energy equation consists of viscous dissipation and thermo-diffusion and diffusion thermo effects. Chemical reaction with activation energy is implemented. Through implementation of second law of thermodynamics the total irreversibility rate is calculated. Mathematical expressions for residual errors are presented. Convergent series solutions by homotopic procedure are developed. Influences of pertinent variables for velocity, entropy generation, temperature, Bejan number and concentration fields are arranged. Moreover the computational analysis of skin friction coefficient and Nusselt number is presented in Tables 2 and 3. It is concluded that entropy generation and Bejan number show opposite impact versus Brinkman number.
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