Analytical study of heat transfer from elliptical cylinder in liquid metals

Ahmad, R. and Khan, W. A. (2008) Analytical study of heat transfer from elliptical cylinder in liquid metals. Journal of Thermophysics and Heat Transfer, 22 3: 522-527. doi:10.2514/1.36093

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Author Ahmad, R.
Khan, W. A.
Title Analytical study of heat transfer from elliptical cylinder in liquid metals
Journal name Journal of Thermophysics and Heat Transfer   Check publisher's open access policy
ISSN 0887-8722
1533-6808
Publication date 2008-09-01
Sub-type Article (original research)
DOI 10.2514/1.36093
Open Access Status Not Open Access
Volume 22
Issue 3
Start page 522
End page 527
Total pages 6
Place of publication Reston, VA, United States
Publisher American Institute of Aeronautics and Astronautics
Language eng
Abstract Previous theoretical Nusselt numbers derived for the heat transfer to liquid metals flowing past an elliptical cylinder were based on the usual assumptions associated with inviscid potential flow. Although, in liquid metals, the thickness of the thermal boundary layer is much greater than the thickness of the hydrodynamic boundary layer, the effects of the thin hydrodynamic boundary layer on the heat transfer process cannot be neglected. In this study, the influence of a thin hydrodynamic boundary layer on the heat transfer from a single elliptical cylinder to liquid metals having low Prandtl numbers (0.001-0.03) is investigated under isothermal and isoflux boundary conditions. Two separate analytical heat transfer models, viscous and inviscid, are developed to clarify the discrepancy between previous results. It is demonstrated that the inviscid model gives higher heat transfer coefficients than the viscid model for both thermal boundary conditions, and the disagreement between the inviscid and viscous flow models originates due to the neglect of the hydrodynamic boundary layer compared to the thermal boundary layer and the effect of the separation of flow on heat transfer.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Created: Mon, 17 Aug 2015, 02:39:02 EST by Rashid Ahmad on behalf of School of Mathematics & Physics