Dufour–Soret dynamics on mixed convection of Eyring–Powell nanofluid past a porous stretching cylinder with Cattaneo–Christov theory

Abstract

The study of non-Newtonian nanofluids over a stretching surface is crucial for analyzing heat and mass transfer in engineering and industrial applications. In this investigation of Powell–Eyring nanofluid flow over a linear stretching cylinder, Cattaneo–Christov heat flux, porous media, Soret–Dufour effects, and mixed convection were incorporated. The governing equation is a partial differential equation (PDE) derived from conservation laws. PDEs are transformed into ordinary differential equations (ODEs) via a similarity transformation. The Keller Box method in MATLAB is used to numerically solve these ODEs. Numerical simulations reveal that the momentum and thermal boundary layer increase with curvature parameters, while the concentration decreases. As magnetic effects increase, the temperature rises, while the velocity and concentration decrease. The thermal boundary layer thickness decreases as the thermophoresis and Brownian motion parameters are increased. However, the effects on the thermal boundary layer diminish as the Eyring–Powell fluid parameter is enhanced. As the curvature parameter increases, the local Sherwood number increases, while the local skin friction and local Nusselt number drop. The results are in excellent agreement with the previously reported convergence of numerical data.