LAMINAR MIXED CONVECTION IN A HORIZONTAL ECCENTRIC ANNULUS

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 for eccentric annuli...

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Bibliographic Details
Published in:Numerical heat transfer. Part A, Applications Applications, 1992-07, Vol.22 (1), p.87-108
Main Authors: Choudhury, Dipankar, Karki, Kailash
Format: Article
Language:English
Subjects:
220200 - Nuclear Reactor Technology- Components & Accessories
240301 - Power Transmission Lines & Cables- Power Cables- (1990-)
420400 - Engineering- Heat Transfer & Fluid Flow
ANNULAR SPACE
CABLES
COHERENT SCATTERING
CONDUCTOR DEVICES
CONFIGURATION
CONVECTION
DISPERSIONS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ENERGY TRANSFER
ENGINEERING
Exact sciences and technology
EXPANSION
Flows in ducts, channels, nozzles, and conduits
Fluid dynamics
FLUID FLOW
FLUIDS
FORCED CONVECTION
FRICTION FACTOR
FUEL ELEMENTS
FUEL RODS
Fundamental areas of phenomenology (including applications)
GENERAL STUDIES OF NUCLEAR REACTORS
HEAT EXCHANGERS
HEAT TRANSFER
LAMINAR FLOW
MASS TRANSFER
MIXTURES
NUSSELT NUMBER
Physics
POWER TRANSMISSION AND DISTRIBUTION
RAYLEIGH SCATTERING
REACTOR COMPONENTS
SCATTERING
SPACE
THERMAL EXPANSION
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Summary: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 for 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.
ISSN:1040-7782
1521-0634
DOI:10.1080/10407789208944760