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国际计算热科学期刊
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN 打印: 1940-2503
ISSN 在线: 1940-2554

国际计算热科学期刊

DOI: 10.1615/ComputThermalScien.2020026224
pages 429-451

ANALYSIS OF PIN FINS INCLUDING RADIATION AND TRANSIENTS

Tyler G. Vincent
Departments of Aerospace & Ocean and Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, USA
Joseph A. Schetz
Departments of Aerospace & Ocean and Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, USA
K. Todd Lowe
Dept. of Aerospace and Ocean Engineering Virginia Tech 215 Randolph Hall, Blacksburg, VA 24061, USA

ABSTRACT

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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