Laminar mixed convection in a horizontal eccentric annulus

Journal Article · Tue Dec 31 23:00:00 EST 1991 · 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), Journal Name: Numerical Heat Transfer. Part A, Applications; (United States) Vol. 22:1; ISSN 1040-7782; ISSN NHAAE
• Country of Publication: United States
• Language: English

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ANNULAR SPACE
CABLES
COHERENT SCATTERING
CONDUCTOR DEVICES
CONFIGURATION
CONVECTION
DISPERSIONS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ENERGY TRANSFER
EQUIPMENT
EXPANSION
FLUID FLOW
FLUIDS
FORCED CONVECTION
FRICTION FACTOR
FUEL ELEMENTS
FUEL RODS
HEAT EXCHANGERS
HEAT TRANSFER
LAMINAR FLOW
MASS TRANSFER
MIXTURES
NUSSELT NUMBER
RAYLEIGH SCATTERING
REACTOR COMPONENTS
SCATTERING
SPACE
THERMAL EXPANSION