EFFECT OF THERMAL-RADIATION ON NATURAL-CONVECTION OVER CYLINDERS OF ELLIPTIC CROSS-SECTION

Citation
Ma. Hossain et al., EFFECT OF THERMAL-RADIATION ON NATURAL-CONVECTION OVER CYLINDERS OF ELLIPTIC CROSS-SECTION, Acta mechanica, 129(3-4), 1998, pp. 177-186
Citations number
22
Categorie Soggetti
Mechanics
Journal title
ISSN journal
00015970
Volume
129
Issue
3-4
Year of publication
1998
Pages
177 - 186
Database
ISI
SICI code
0001-5970(1998)129:3-4<177:EOTONO>2.0.ZU;2-J
Abstract
The effect of conduction-radiation on natural convection flow of an op tically dense viscous incompressible fluid along an isothermal cylinde r of elliptic cross section has been investigated. The boundary layer equations governing the flow are shown to be nonsimilar. Full numerica l solutions of the governing equations are obtained using the implicit finite difference method. The solutions are expressed in terms of the Nusselt number Nu against the eccentric angle alpha in the range [0, pi]. The working fluid is taken to have unit value of the Prandtl numb er, Pr, and the effects of varying the Planck number, R-d, the surface temperature parameter, theta(w), and the parameter A(0) representing the ratio of the major and minor axes of the cylinder are investigated . From the present analysis it is found that the rate of heat transfer from the slender body is higher than from the blunt body and that the se higher values become even higher due to an increase in the effect o f radiation in the flow field.