Boundary layer flow of a Walter’s B fluid driven by a stretching cylinder with viscosity influenced by temperature and concentration variations
Resumo
The present work investigates the heat and mass transfer in a steady boundary layer flow of a Walter’s B fluid driven by a stretching cylinder, taking into account the effects of temperature-and concentration-dependent variable viscosity. The primary goal is to analyze the flow under free convection, incorporating the Rosseland approximation to model thermal radiation, which constitutes a novelty of the work. By employing similarity transformations, the governing equations are reduced to a system of nonlinear ordinary differential equations. A comprehensive analysis of the variations in velocity, temperature, and concentration is conducted through numerical simulations for different flow-related parameters. In addition, the skin friction coefficient ($C_f$), Nusselt number ($N_u$), and Sherwood number ($S_h$) are evaluated. It is observed that an increase in the Stefan–Boltzmann constant ($\sigma$) and the mean absorption coefficient ($k$) reduces the fluid temperature.
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