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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

OPTIMAL FIN PROFILES - CLASSICAL AND MODERN

Get access (open in a dialog) DOI: 10.1615/IHTC9.1230
pages 15-19

Résumé

E. Schmidt's solution to the classical problem of how to shape a fin so as to maximize its performance came under scrutiny 13 years ago because of a length-of-arc postulate implicit in the model. The senior authors have recently shown that without the postulate the mathematical model is not well-posed - fins of unlimited effectiveness are consistent with the modified equations. However the profoundly corrugated surfaces associated with the counterexamples strain the credibility of the classical model's assumption of constant heat transfer coefficient. This paper reexamines the new designs with a realistic characterization of the coefficient and finds that they still can be expected to outperform the Schmidt fin by nearly 350% in some cases.