Published 12 issues per year
ISSN Print: 1091-028X
ISSN Online: 1934-0508
Indexed in
Radiation Effects on Mixed Convection over a Nonisothermal Cylinder and Sphere in a Porous Media
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 Rd, 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 Rd 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.
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