Magneto-Soret-Dufour thermo-radiative double-diffusive convection heat and mass transfer of a micropolar fluid in a porous medium with Ohmic dissipation and variable thermal conductivity

Dulal Pal ^a,*, Bhuban Chandra Das ^b, Kuppalapalle Vajravelu ^c

a. Department of Mathematics, Siksha Bhavana, Visva-Bharati University, Santiniketan-731 235, West Bengal, India
         b. Department of Mathematics, Rammohan College, 102/1 Raja Rammohan Sarani, Kolkata-700 009, India
         c. Department of Mathematics, Department of Mechanical, Material and Aerospace Engineering, University of Central Florida, Orlando, FL32816, USA

Abstract: This paper deals with developing a numerical boundary layer flow model to analyze convective heat transfer characteristics of a micropolar fluid past a vertical plate in a composite material with viscous-Ohmic dissipations in the presence of a transverse magnetic field. The basic governing equations are solved numerically by using the Runge-Kutta Fehlberg method. The computed results reveal a reduction in the velocity, temperature, and microrotation profiles by increasing the Prandtl number. Also, the concentration distribution is enhanced by enhancing or decreasing Soret-Dufour parameter, and there seems to be decremented in the skin-friction coefficient values with Schmidt number.

Keywords: Double diffusive convection; Thermal radiation; Micropolar fluid; Soret-Dufour

https://doi.org/10.1016/j.jppr.2022.02.001