Impact of Chemical Reaction on Three-Dimensional Casson Nanofluid Flow over a Rotating Surface with Prescribed Heat Flux, Viscous Dissipation, and Heat Source/Sink Effects

Résumé

This work explores the heat transfer behavior and three-dimensional flow of a Casson nanofluid over a continuously stretching flat surface within a rotating reference frame, accounting for the effects of chemical reaction and thermal source or sink. The analysis is based on the Buongiorno nanofluid model, incorporating viscous dissipation and a constant heat flux condition at the surface. To handle the complexity of the nonlinear partial differential equations, the study employs the non-Newtonian Casson fluid model alongside the boundary layer approximation. The governing equations are transformed into a dimensionless form and solved numerically using the shooting technique combined with the Adam's Moulton method, programmed in Fortran. A comprehensive parametric study is carried out to investigate the impacts of various dimensionless parameters on velocity profiles, temperature distribution, concentration fields, and engineering quantities such as the Nusselt number, skin friction, and Sherwood number. The results demonstrate strong agreement with previously published studies under specific limiting cases. The findings of this research have significant applications in various engineering and industrial fields. Specifically, they are crucial for designing advanced cooling systems for high-temperature rotating machinery, such as gas turbines and rotating heat exchangers used in aerospace and power generation industries. The inclusion of chemical reaction effects, heat source/sink mechanisms, and non-Newtonian fluid behavior makes this study relevant to enhanced cooling technologies for rotating electrical machines, nuclear reactors, and energy storage systems. Moreover, the results can be utilized in biomedical applications involving nanofluid transport in rotating systems, such as targeted drug delivery devices and blood flow modelling in rotating biological environments.