Effects of viscous dissipation and fluid axial heat conduction on heat transfer for non-Newtonian fluids in ducts with uniform wall temperature

The present paper, which is an extension of a previous study [O. Jambal, T. Shigechi, D. Ganbat, S. Momoki, Int. Commun. Heat Mass Transf. 32(9) (2005) 1165] on laminar heat transfer to non-Newtonian fluids in parallel plates and circular ducts, deals with concentric annular ducts subjected to a ste...

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Bibliographic Details
Published in:International communications in heat and mass transfer 2005-10, Vol.32 (9), p.1174-1183
Main Authors: Jambal, O., Shigechi, T., Davaa, G., Momoki, S.
Format: Article
Language:English
Subjects:
Annular ducts
Fluid axial heat conduction
Laminar heat transfer
Non-Newtonian fluid
Viscous dissipation
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Summary:The present paper, which is an extension of a previous study [O. Jambal, T. Shigechi, D. Ganbat, S. Momoki, Int. Commun. Heat Mass Transf. 32(9) (2005) 1165] on laminar heat transfer to non-Newtonian fluids in parallel plates and circular ducts, deals with concentric annular ducts subjected to a step change in wall temperature. A finite-difference scheme is applied to determine the velocity and temperature fields. Developing Nusselt numbers are graphically shown for various Brinkman numbers and Peclet numbers and the effects of viscous dissipation, fluid axial heat conduction, non-Newtonian behavior together with the radius ratio effect on heat transfer are discussed.
ISSN:0735-1933
1879-0178
DOI:10.1016/j.icheatmasstransfer.2005.07.003