Heat and mass transfer flow over a stretching surface with Ohmic heating and chemical reaction

Abstract

The present study analyzes the effect of chemical reaction on an unsteady magnetohydrodynamic boundary layer viscous fluid over a stretching surface embedded in a porous medium with a uniform transverse magnetic field. A Darcy‐Forchheimer drag force model is employed to simulate the effect of second‐order porous resistance. Dissipative heat energy based on both viscous and Joule dissipation along with a heat source/sink is considered to enhance the energy equation. Similarity analysis is imposed to transform the governing differential equations into a set of nonlinear coupled ordinary differential equations. These sets of equations are solved numerically using the Runge‐Kutta fourth‐order scheme followed by the shooting algorithm. The effects of physical parameters such as magnetic field, Prandtl number, Eckert number, Schmidt number, unsteadiness parameter, and chemical reaction parameters have been discussed on velocity, temperature, and concentration fields. Computation for the coefficient of skin friction, rate of heat and mass transfer is done and presented in a table for validation of the present outcomes.

Impacts of thermal radiation, viscous dissipation, ohmic heating, and diffusion‐thermo effects on unsteady MHD free convective rotating flow of second‐grade fluid with Hall and ion‐slip currents

“…Substituting these Equations ( 30)- (32) in Equations ( 25)- (27), we can able to acquire the zeroth and first order equations as…”

“…Its tremendous usages are in the production of polymer, drying, ceramic, food processing, cooling towers, and so forth. Studies that explored the influence of chemical reaction and slip flow are done by Muthucumaraswamy and Ganesan, 25 Prakash et al, 26 Mishra et al, 27 Hayat et al 28 Das, 29 Ibrahim et al, 30 Gnaneswara Reddy, 31 Goud et al, 32 Pal and Talukdar, 33 Mukhopadhyay et al, 34 Obalalu et al, 35 Sheri et al, 36 and Megaraju et al 37 In all the above-mentioned studies, the impact of diffusion thermo or Dufour was neglected. The process of heat and mass transfer in a moving fluid affects each other and the result is a cross-diffusion effect.…”