Axial heat conduction effects in the entrance region of parallel plate ducts

Exact series solutions for the computation of temperature in parallel plate channels and circular passages are well known. The inclusion of the contribution of axial conduction leads to a set of modified Graetz type problems for these fluid passages. The emphasis of this paper is the study of the as...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2008-12, Vol.51 (25), p.5811-5822
Main Authors: Haji-Sheikh, A., Beck, J.V., Amos, Donald E.
Format: Article
Language:English
Subjects:
Applied sciences
Axial conduction
Convection
Duct flow
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heat transfer
Parallel-plate ducts
Theoretical studies. Data and constants. Metering
Thermal entrance
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Summary:Exact series solutions for the computation of temperature in parallel plate channels and circular passages are well known. The inclusion of the contribution of axial conduction leads to a set of modified Graetz type problems for these fluid passages. The emphasis of this paper is the study of the asymptotic variations of wall heat flux values adjacent to the thermal entrance location for parallel plate ducts. The acquired results show interesting variations for different values of the Peclet number near the thermal entrance location. This study reports the unique variations of the wall heat flux values near the location where the wall temperature changes as the Peclet number changes.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2008.04.056