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Journal of Enhanced Heat Transfer
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ISSN Imprimer: 1065-5131
ISSN En ligne: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v13.i4.30
pages 309-320

Laminar Flow and Heat Transfer in Periodic Serpentine Mini-Channels

Paul E. Geyer
School of Chemical and Biomolecular Engineering, University of Sydney,
Nathan R. Rosaguti
Department of Chemical Engineering, University of Sydney,
David F. Fletcher
School of Chemical and Biomolecular Engineering, The University of Sydney, Australia
Brian S. Haynes
School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia

RÉSUMÉ

This paper presents numerical studies into fully developed laminar flows and heat transfer in periodic serpentine ducts with circular, semi-circular, and square cross sections. These studies are of relevance to laminar duct flows with zero wall slip, and geometries analogous to those found in compact plate heat exchangers. Flow and heat transfer characteristics are reported for a fixed geometry with a constant heat flux applied at the walls over a range of Reynolds numbers (Re = 5−200) and Prandtl numbers (Pr = 0.7−100). It was found that for water (Pr = 6.13) heat transfer is enhanced by a factor of between 2.5 and 3 depending on the geometry. Pressure drop penalties and heat transfer enhancements within a single repeating module are calculated relative to the results obtained for fully developed flows in a straight section of pipe of equal path length.


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