Modelling and Simulation of Chemically Reactive Micropolar Nanofluid Flow with Viscous Dissipation and Suction in a Porous Medium

Résumé

The objective of the present analysis is to investigate the heat and mass transfer characteristics of a micropolar nanofluid flow driven by a permeable surface with suction effects, incorporating the influence of viscous dissipation and chemical reaction. The thermal behavior is further enhanced by including radiative heat transfer and Dufour diffusion mechanisms. The governing nonlinear partial differential equations accounting for momentum, microrotation, energy, and concentration are transformed into a dimensionless form using similarity transformations. The resulting system of coupled ordinary differential equations is solved using MATLAB’s robust bvp5c solver.  Validation of the numerical approach is carried out through comparison with published results in the limiting cases. Parametric impacts on velocity, microrotation, temperature, and concentration profiles are thoroughly analyzed. The results reveal that viscous dissipation amplifies thermal gradients while chemical reactions suppress concentration levels. Additionally, variations in surface quantities such as skin friction, local Nusselt number, and local Sherwood number are evaluated to assess boundary layer behavior. The extended model offers a more comprehensive understanding of thermally and chemically active micropolar nanofluid flows, with implications in thermal processing, energy systems, and biomedical engineering.