ITEMS

modern scholarly publishers in the finest tradition

Journals

	Search

Journal of Porous Media

ISSN for PRINT: 1091-028X

Institutional price:	$713.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2006, Volume9

100 pages

Issue price - $155.00

Radiation Effects on Mixed Convection over a Nonisothermal Cylinder and Sphere in a Porous Media

H. M. Duwairi
Mechanical Engineering Department, Faculty of Engineering and Technology, The University of Jordan, Amman, Jordan

ABSTRACT

In this paper, numerical solutions for the effect of thermal radiation on mixed convection of optically dense viscous fluids about a nonisothermal cylinder and sphere is presented. The governing equations are transformed by using a set of nonsimilarity variables and solved by using the Keller box method. Numerical results for the dimensionless velocity and temperature profiles and local Nusselt number for the mixed convection parameter ζ, the power index of temperature variation λ, the radiation-conduction parameter R_d, and the surface temperature parameter H are presented. Comparison with previous works shows complete agreement. It is found that when the radiation effect becomes significant for both cases of large values of R_d and H, the local Nusselt numbers are also greatly increased; this is due to the important role played by the radiation mechanism in transferring heat between gray fluid layers.