MHD free convection-radiation interaction in a porous medium - part II : Soret/Dufour effects

Vasu, B; Gorla, RSR; Murthy, PVSN; Prasad, VR; Beg, OA; Siddiqa, S

Abstract

This paper is focused on the study of two dimensional steady magnetohydrodynamics heat and
mass transfer by laminar free convection from a radiative horizontal circular cylinder in a nonDarcy porous medium by taking account the Soret/Dufour effects. The boundary layer
equations, which are parabolic in nature, are normalized into non-similar form and then solved
numerically with the well-tested, efficient, implicit, stable Keller–Box finite-difference
scheme. Numerical results obtained for the velocity, temperature and concentration
distributions, as well as the local skin friction, Nusselt number and Sherwood number for
several values of the parameters, namely the buoyancy ratio parameter, Prandtl number,
Forchheimer number, magnetohydrodynamic body force parameter, Soret and Dufour
numbers. The dependency of the thermophysical properties has been discussed on the
parameters and showed graphically. Increasing Forchheimer inertial drag parameter reduces
velocity but elevates temperature and concentration. Increasing Soret number and
simultaneously reducing Dufour number greatly boosts the local heat transfer rate at the
cylinder surface. A comparative study between the previous published and present results in a
limiting sense is found in an excellent agreement.

Citation

Vasu, B., Gorla, R., Murthy, P., Prasad, V., Beg, O., & Siddiqa, S. (2020). MHD free convection-radiation interaction in a porous medium - part II : Soret/Dufour effects. International Journal of Applied Mechanics and Engineering, 25(2), 157-175. https://doi.org/10.2478/ijame-2020-0027

• Journal Article Type: Article
• Acceptance Date: Mar 10, 2020
• Online Publication Date: Jun 5, 2020
• Publication Date: Jun 5, 2020
• Deposit Date: Mar 16, 2020
• Publicly Available Date: Jul 1, 2020
• Journal: International Journal of Applied Mechanics and Engineering
• Electronic ISSN: 2353-9003
• Publisher: De Gruyter
• Volume: 25
• Issue: 2
• Pages: 157-175
• DOI: https://doi.org/10.2478/ijame-2020-0027
• Publisher URL: https://doi.org/10.2478/ijame-2020-0027
• Related Public URLs: https://content.sciendo.com/view/journals/ijame/ijame-overview.xml?lang=en