Laminar mixed convection in a horizontal eccentric annulus

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Numerical Heat Transfer. Part A, Applications; (United States)

DOI:https://doi.org/10.1080/10407789208944760· OSTI ID:7109591

Choudhury, D ^[1]; Karki, K ^[2]

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1. Fluent, Inc., 10 Cavendish Ct., Centerra Resource Park, Lebanon, New Hamsphire (GB)
2. Innovative Research, Inc., Minneapolis, MN (US)

Laminar fluid flow and heat transfer phenomena in cylindrical annuli are encountered in various applications. The purpose of this paper is to present a numerical study of laminar mixed convection in horizontal eccentric annuli. Axial flow and heat transfer in a horizontal cylindrical annulus can be influenced by eccentricity of the inner cylinder and the presence of buoyancy forces. A numerical study is presented for the combined forced and free convection for the fully developed flow and heat transfer to eccentric annuli of different eccentricities and radius ratios. The flow field is characterized by large cross-stream secondary currents and significant flow distortion. The Nusselt number increases significantly with the Rayleigh number; the corresponding increase in the friction factor is relatively small. The eccentricity introduces additional nonuniformity of the flow and temperature fields.

• OSTI ID: 7109591
• Journal Information: Numerical Heat Transfer. Part A, Applications; (United States), Vol. 22:1; ISSN 1040-7782
• Country of Publication: United States
• Language: English

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22 GENERAL STUDIES OF NUCLEAR REACTORS
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ELECTRIC CABLES
HEAT TRANSFER
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FUEL RODS
HEAT EXCHANGERS
ANNULAR SPACE
ELECTRICAL INSULATION
FORCED CONVECTION
FRICTION FACTOR
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RAYLEIGH SCATTERING
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CONDUCTOR DEVICES
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EXPANSION
FLUID FLOW
FUEL ELEMENTS
MASS TRANSFER
REACTOR COMPONENTS
SCATTERING
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