Publication:
Axial heat conduction effects in laminar duct flow

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Authors
Girgin, Ibrahim
Subjects
Advisors
Ashok, Gopinath
Date of Issue
1998-06-01
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A numerical model for heat transfer in laminar duct flows has been developed using the finite difference method to explore the significance and extent of "back-conduction" at low Peclet numbers. The calculations have been carried out for flows between parallel plates and in circular tubes by using different Peclet numbers in the range of 0.05 to 100. For both situations constant heat flux and constant wall temperature boundary conditions were used. The validity of the results has been checked by comparison with some existing results in the literature, and extended to a wider range of parameters including conjugate wall conduction effects. The results are presented for bulk mean temperature variation, Nusselt number behavior, and energy absorbed before the heated section, for cases with and without wall conduction. Such axial conduction effects may be an important feature in the thermal characterization of microtubes, which are to be used in microheat exchangers
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Thesis
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Format
xiv, 77 p.;28 cm.
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Approved for public release; distribution is unlimited.
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