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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

OSCILLATORY HEAT TRANSFER IN EXTENDED SURFACES

Get access (open in a dialog) DOI: 10.1615/IHTC9.1390
pages 111-116

Abstract

This paper revisits the problem of transient heat transfer in which an isolated, straight rectangular fin with an adiabatic tip is subjected to a periodic temperature variation at its base. A solution is obtained for the temperature distribution within the fin, using a one-dimensional approximation, from which the heat flow characteristics are determined. As an indication of fin performance, the fin efficiency and average fin efficiency are calculated. Also in the present paper a two-dimensional solution to the same problem is determined analytically. The effects of varying the fin dimensions and amplitude and frequency of oscillation are investigated. A comparison of the results produced from both solutions then establishes the criteria for which the one-dimensional approximation becomes valid.