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ACRC Technical Report 93PDF


Title:Heat Transfer Enhancement Mechanisms in Parallel-Plate Fin Heat Exchangers
Author(s):Zhang, L.W.; Balachandar, S.; Tafti, D.K.; Najjar, F.M.
Subject(s):louvered-fin heat exchangers
Abstract:The heat transfer enhancement mechanisms and the performance of parallel-plate-fin heat exchangers are studied using large scale direct numerical simulation. Geometry effects such as finite fin thickness and fin arrangements (inline and staggered) have been investigated. The time-dependent flow behavior due to vortex shedding has been taken into consideration by solving the unsteady Navier-Stokes and energy equations in two-dimensions. In the unsteady regime, in addition to the time-dependent calculations, companion steady symmetrized flow calculations have also been performed to clearly identify the effect of vortex shedding on heat transfer and pressure drop. Additional comparisons have been made with the theoretical results for fully developed flow between uninterrupted continuous parallel plates and that of restarted boundary layers with negligible fin thickness [1], in order to quantify the role of boundary layer restart mechanism and the effect of finite fin geometry.
Issue Date:1996-04
Publisher:Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Air Conditioning and Refrigeration Center TR-93
Genre:Technical Report
Sponsor:Air Conditioning and Refrigeration Center Project 38
Date Available in IDEALS:2009-04-20

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