Significance of Cattaneo-Christov heat flux model and heat generation/absorption with chemical reaction in Walters’ B fluid via a porous medium in the presence of Newtonian heating

Abstract

This study investigates the Walters’ B fluid in two-dimensional boundary layer flow through a porous medium of an exponentially stretching sheet. In the face of Newtonian heating, the Cattaneo-Christov heat flux model which expresses the thermal relaxation time is examined together with heat generation/absorption for the heat equation. The resulting equations of the model are resolved into non-dimensional forms, which are further performed by the Homotopy Analysis Method. The key findings along with the result obtained demonstrated that the Cattaneo-Christov heat flux which depicts the thermal relaxation time makes low the temperature field, indicating that the neighbouring particles crave for more time for the heat to fall deeper, while heat generation/absorption, as well as Newtonian heating, permit the quick infiltration of thermal sequel to the quiescent fluid which in turn aids the dryness of the materials. Meanwhile, the variation in local Weissenberg number triggers viscoelasticity whose application is crucial for the processing of the polymer in industries and other related disciplines.