A Complementary Experimental and Numerical Study of the Flow and Heat Transfer in Offset Strip-Fin Heat Exchangers-Reference-Cited by-同舟云学术

A Complementary Experimental and Numerical Study of the Flow and Heat Transfer in Offset Strip-Fin Heat Exchangers

Published:1998-08-01 Issue:3 Volume:120 Page:690-698
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

DeJong N. C.¹,Zhang L. W.¹,Jacobi A. M.¹,Balachandar S.²,Tafti D. K.³

Affiliation:

1. Department of Mechanical and Industrial Engineering, University of Illinois, Urbana, IL 61801

2. Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, IL 61801

3. National Center for Supercomputing Applications, University of Illinois, Urbana, IL 61801

Abstract

A detailed analysis of experimental and numerical results for flow and heat transfer in similar offset strip-fin geometries is presented. Surface-average heat transfer and pressure drop, local Nusselt numbers and skin friction coefficients on the fin surface, instantaneous flow structures, and local time-averaged velocity profiles are contrasted for a range of Reynolds numbers using both prior and new experimental and numerical results. This contrast verifies that a two-dimensional unsteady numerical simulation captures the important features of the flow and heat transfer for a range of conditions. However, flow three-dimensionality appears to become important for Reynolds numbers greater than about 1300, and thermal boundary conditions are important for Reynolds numbers below 1000. The results indicate that boundary layer development, flow separation and reattachment, wake formation, and vortex shedding are all important in this complex geometry.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/120/3/690/5911240/690_1.pdf

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