Heat conduction in the hollow sphere with a power-law variation of the external heat transfer coefficient

• Type: Article in International Scientific Journal
• Date: 2000

Authors

J. F. Branco (Author) Other; Carlos Tavares de Pinho (Author) FEUP; R. A. Figueiredo (Author) Other

Journal

Title: International Communications in Heat and Mass Transfer

Vol. 27 No. 8

Pages: 1067-1076

ISSN: 0735-1933

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-000-YK4

DOI: 10.1016/s0735-1933(00)00194-9

Abstract (EN): The conduction phenomenon in an insulated sphere is re-worked through a dimensionless approach, where the heat transfer coefficient dependence on the external radius and on the surface temperature, as in the case of forced and free convection, is taken into account. Assuming a power law variation of the convection coefficient [1, 2], and using the results of Sparrow [3], equations and graphs for the most important dimensionless parameters are presented. The developed equations show, for example, that as the insulation thickness increases the heat transfer rate tends to a positive value, independent of the considered case: constant convection coefficient, forced or free convection. (C) 2000 Elsevier Science Ltd.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10