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ISSN 打印: 1064-2285
ISSN 在线: 2162-6561

传热学

DOI: 10.1615/HeatTransRes.2013006719
pages 1-21

ANALYSIS OF THERMALLY DEVELOPING LAMINAR CONVECTION IN THE FINNED DOUBLE-PIPE HEAT EXCHANGER

Mazhar Iqbal
School of Natural Sciences, National University of Sciences and Technology, Islamabad, Pakistan
K. S. Syed
CASPAM, B.Z.U, Multan, Pakistan

ABSTRACT

In this work we have carried out the study of convective heat transfer of hydrodynamically fully developed but thermally developing laminar flow in the entrance region of a finned double-pipe heat exchanger. We have taken one-dimensional temperature profile in the radial direction of the fins under the thin fin assumption. It is shown that the heat transfer rate in the thermal entrance region is much higher than in the fully developed region, and the assumption of infinite fin conductivity loses validity in the entrance region.


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