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Computational Thermal Sciences: An International Journal

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ISSN Печать: 1940-2503

ISSN Онлайн: 1940-2554

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ANALYSIS OF PIN FINS INCLUDING RADIATION AND TRANSIENTS

Том 12, Выпуск 5, 2020, pp. 429-451
DOI: 10.1615/ComputThermalScien.2020026224
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Краткое описание

The design of fins for heat transfer enhancement remains a topic of great interest in a number of engineering areas and applications, despite 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. Developed here is an enhanced low-order model (LOM) that extends traditional pin fin analysis to include a more realistic radiation treatment and that further allows temperature-dependent 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 modeling (ROM) technique was developed and illustrated, which couples 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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ЦИТИРОВАНО В
  1. Powers Sean W., Schetz Joseph A., Lowe K. Todd, Kapania Rakesh K., Analysis of Stresses in Metal Sheathed Thermocouples in High-Temperature Flows, AIAA Journal, 59, 9, 2021. Crossref

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