Insight into the significance of ramped wall temperature and ramped surface concentration: The case of Casson fluid flow on an inclined Riga plate with heat absorption and chemical reaction

Abstract

Abstract The importance of heat absorption and chemical reactions and their impact in engineering is increasingly appreciated. However, little is known about the effect of chemical reaction and heat absorption of ramped wall temperature and ramped surface concentration on a Casson fluid flow over a rapidly accelerated inclined Riga plate. The aim of the study, among other findings along an inclined Riga plate, is to address the impact of heat sink and chemical reaction over a ramped temperature and ramped surface concentration. By introducing relevant similarity variables, the dimensional governing equations are non-dimensionalized and parameterized. After that, the derived parameterized governing equations are solved analytically using the Laplace transform method. Graphs are used to discuss and analyse the effects of various physical parameters on momentum, energy, and concentration. The latest findings are verified by comparing them to previous results. Tables are also used to determine skin friction, Nusselt number, and Sherwood number expressions. Comparatively, it's worth noting that chemical reaction, Casson, and heat absorption parameters tend to escalate Skin friction for both ramped temperature and ramped surface concentration. Moreso, an increase in the chemical reaction and heat absorption parameters induces a decrease in the momentum distribution.