ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4
ISSN Imprimer: 1940-2503
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Computational Thermal Sciences: An International Journal
ANALYSIS OF PIN FINS INCLUDING RADIATION AND TRANSIENTS
K. Todd Lowe
The design of fins for heat transfer enhancement remains a topic of great interest in a number of engineering areas and applications, despite an extensive literature on the subject. One can apply detailed computational methods for simultaneous convection, conduction and radiation heat transfer, but such approaches are not suitable for rapid, routine design studies. So, there is still a place for approximate analytical and low-cost numerical methods, and that is the subject of the first part of this paper. We have created an enhanced, low-order model (LOM) that extends traditional pin fin analysis to include a more realistic radiation treatment and also variable thermal conductivity, variable heat transfer coefficients over the tip and sides of the fin with variable area distribution, and transient response. The LOM solution procedure was packaged in a MATLAB code intended for routine use by designers and analysts. Next, a novel reduced-order modelling (ROM) technique was developed and illustrated, which integrates heat transfer coefficient information from a computational fluid dynamics/conjugate heat transfer (CFD/CHT) simulation with the new LOM, boasting significantly reduced run times with comparable accuracy to the original full-scale simulations.
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