Analysis of entropy generation and activation energy on double diffusive magnetohydrodynamic Williamson nanofluid flow featuring nonlinear thermal radiation

In this article, we study the effects of the generation of entropy on the transfer of heat and mass by considering the activation energy in the Williamson nanofluid. The importance of Brownian motion and thermophoresis are analysed in various fields over a vertical stretching sheet. The mathematical governing basic equations are solved efficiently by using the spectral quasilinearisation (SQL) method. Numerous physical parameters are considered to plot profiles of nanofluid velocity, temperature, concentration and entropy generation fields. It is exhibited that the velocity profiles tend to reduce due to enhancement in magnetic and Williamson parameters. Furthermore, the entropy generation profile diminishes for the higher Williamson parameters, whereas it enhances due to higher values of the Brinkman numbers. Also, it is noticed that the temperature profile increases by enhancing the values of the activation parameter, whereas the entropy generation diminishes due to increasing the values of the activation parameter. © 2022 Informa UK Limited, trading as Taylor & Francis Group.