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Experimental and numerical study of forced convection heat transfer from array of fins with various cross perforations

Experimental and numerical study of forced convection heat transfer from array of fins with... In this paper, heat transfer characteristics of new types of perforated fins with cross perforations are investigated using experimental measurement and numerical simulations. Conjugate equations of turbulent flow and conduction heat transfer are solved around fins and within fins using a finite volume code. Solution includes two types of circular and square perforations and Reynolds numbers from 2×104 to 4×104 based on the fin length. From the results of nu-merical simulation, structures of flow field and heat transfer for each configuration are illustrated and discussed. For validation, comparison is made with solid fin as well as perforated fins and reasonable trend for heat transfer is ob-served. For further analysis, a series of measurements is carried out for a model of perforated fins with one streamwise opening and one cross opening. It is shown that among different perforation configurations, a fin with 1 longitudinal perforation and 3 vertical perforations shows the best heat transfer performance. In addition, it is found that the circular perforation is preferred in comparison with square perforation considering both heat transfer performance and pressure drop. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Experimental and numerical study of forced convection heat transfer from array of fins with various cross perforations

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Publisher
Springer Journals
Copyright
Copyright © 2019 by H. Saadat, M.M. Tavakol, and M. Yaghoubi
Subject
Physics; Thermodynamics
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/S0869864319040061
Publisher site
See Article on Publisher Site

Abstract

In this paper, heat transfer characteristics of new types of perforated fins with cross perforations are investigated using experimental measurement and numerical simulations. Conjugate equations of turbulent flow and conduction heat transfer are solved around fins and within fins using a finite volume code. Solution includes two types of circular and square perforations and Reynolds numbers from 2×104 to 4×104 based on the fin length. From the results of nu-merical simulation, structures of flow field and heat transfer for each configuration are illustrated and discussed. For validation, comparison is made with solid fin as well as perforated fins and reasonable trend for heat transfer is ob-served. For further analysis, a series of measurements is carried out for a model of perforated fins with one streamwise opening and one cross opening. It is shown that among different perforation configurations, a fin with 1 longitudinal perforation and 3 vertical perforations shows the best heat transfer performance. In addition, it is found that the circular perforation is preferred in comparison with square perforation considering both heat transfer performance and pressure drop.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Nov 26, 2019

References