Investigación

 

MHD effects on natural convection laminar flow from a horizontal circular cylinder in presence of radiation

 

Tariq Javed, Abid Majeed and Irfan Mustafa*

 

Department of Mathematics and Statistics, FBAS, International Islamic University, Islamabad 44000, Pakistan. *Tel.: +92 51 9019511. e-mail: irfanmustafa1983@yahoo.com

 

Received 3 June 2015;
accepted 14 September 2015

 

Abstract

In this study, the effect of magnetoliydrodynamic (MHD) on natural convection flow from a horizontal circular cylinder in the presence of radiation has been investigated. The governing boundary layer equations are converted into non-dimensional partial differential equations by using the suitable transformation and then solved numerically by employing an accurate implicit finite difference scheme known as Keller-box method. We presented the influence of emerging non-dimensional parameters namely the MHD parameter M with combination of surface heating parameter θ_w and radiation-conduction parameter R_d on velocity and temperature profiles, skin friction coefficient and Nusselt number through graphs and tables. It is observed that the Lorentz force reduces the velocity, skin friction coefficient and Nusselt number. Moreover temperature increases in the presence of MHD effect. The streamlines and isotherms reflect some attractive flow patterns which show that magnetic parameter M and radiation parameter R_d have deep influence on these fluid and heat flow patterns.

Keywords: MHD; radiation; horizontal circular cylinder; numerical solution.

PACS: 47.10.ad; 02.60.Cb;44.20.+b

 

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