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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

ADVANCES IN MODELING ENHANCED HEAT TRANSFER SURFACES

Get access (open in a dialog) DOI: 10.1615/IHTC10.1980
pages 445-459

Resumo

Enhanced heat transfer technology has developed to be a subject of considerable importance in industrial heat transfer equipment. Enhanced heat transfer surfaces typically involve specially configured surface geometries, or external fields, which provide higher heat transfer coefficients. Because enhanced surfaces typically involve a significant number of dimensional variables, heat transfer prediction is much more difficult than, for example flow in a plain, round tube. Significant advances have been made in understanding the enhancement mechanism and in the development of methods to predict the heat transfer and friction characteristics. The predictive methods range from correlations needed by the designer to mechanistically based analytical models and numerical solutions. Considerable advances have been made in rationally based models for boiling, condensation, and single-phase flow. The sophisticated models are able to predict the effect of geometrical parameters and fluid properties. Problems involving both laminar and turbulent flow have been addressed by numerical solution of the momentum and energy equations has addressed. This paper reviews the advances that have been made for the various heat transfer modes and enhancement techniques. We conclude that the subject of enhanced heat transfer has moved substantially away from the empirical art that dominated the subject area 10−20 years ago. With rationally based understanding, more advanced, enhanced surface geometries should follow along.