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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

EFFECT OF TEMPERATURE-DEPENDENT VISCOSITY ON FREE CONVECTION OVER CYLINDERS OF ELLIPTIC CROSS SECTION

Get access (open in a dialog) DOI: 10.1615/IHTC13.p6.290
11 pages

Аннотация

The problem of steady free convection boundary layers over isothermal horizontal cylinders of elliptic cross section when the major axis is both horizontal (blunt elliptic cylinder) and vertical (slender elliptic cylinder) placed in an incompressible fluid of temperature-dependent viscosity will theoretically be considered in this paper. The boundary layer equations governing the flow are shown to be non-similar. Full numerical solutions of these equations are obtained using an efficient implicit finite-difference method known as the Keller-box scheme. Numerical calculations are carried out for various values of the dimensionless parameters of the problem, which include the Prandtl number Pr, the viscosity/temperature parameter θr, the eccentric angle ζ and the parameter b/a representing the ratio of the major and minor axes of the cylinder, respectively. It can be concluded that the heat transfer is significantly influenced by these parameters. The results are presented in tabular and graphical form. The obtained results are compared with those from a previous study for a constant viscosity (θr ), and it is shown that the agreement is very good.