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Journal of Porous Media
インパクトファクター: 1.49 5年インパクトファクター: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN 印刷: 1091-028X
ISSN オンライン: 1934-0508

巻:
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Journal of Porous Media

DOI: 10.1615/JPorMedia.v9.i3.60
pages 251-259

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

Hamzeh M. Duwairi
Mechanical Engineering Department, Faculty of Engineering and Technology, The University of Jordan, 11942, Amman, Jordan

要約

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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