A study of free convection heat transfer in a horizontal annulus with a large radii ratio
Steady laminar natural convection heat transfer in a horizontal annulus with a large radii ratio (R) of 11.4 (and inner-cylinder diameter, D /SUB i/ , of 1.27 cm) has been investigated. Experimental data for air, glycerin and mercury in the ranges 0.023 less than or equal to Pr less than or equal to 10,000 and 0.2 less than or equal to Gr /SUB D/ /SUB i/ less than or equal to X 10/sup 6/ are reported. The influence of the variation of fluid properties as compared to the usual assumption of constant fluid properties has been explored numerically for air and glycerin. The heat transfer computations for air do not change with variation of fluid properties, whereas for glycerin significant differences in the local heat transfer distributions and flow patterns are observed. The experimental data have been correlated with some other data from the literature for smaller values of R, and it has been shown that the heat transfer from the inner-cylinder should be almost the same as that in an infinite medium when R greater than or equal to 10.
- Research Organization:
- Department of Mechanical Engineering, The University of Calgary, Calgary, Alberta
- OSTI ID:
- 5275634
- Report Number(s):
- CONF-830702-
- Journal Information:
- HTD (Publ.) (Am. Soc. Mech. Eng.); (United States), Journal Name: HTD (Publ.) (Am. Soc. Mech. Eng.); (United States) Vol. HTD-VOL.26; ISSN ASMHD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
AIR
ALCOHOLS
ANNULAR SPACE
CALCULATION METHODS
CONFIGURATION
CONVECTION
CYLINDERS
DATA
DATA ANALYSIS
ELEMENTS
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUID FLOW
FLUIDS
GASES
GLYCEROL
HEAT TRANSFER
HEAT TRANSFER FLUIDS
HYDROXY COMPOUNDS
INFORMATION
LAMINAR FLOW
MERCURY
METALS
NATURAL CONVECTION
NUMERICAL DATA
ORGANIC COMPOUNDS
RINGS
SPACE
STEADY FLOW