Natural convection of cold water in a vertical annulus with constant heat flux on the inner wall

Journal Article · Thu Feb 01 00:00:00 EST 1990 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910332· OSTI ID:5754370

Ho, C J; Lin, Y H ^[1]

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1. National Cheng Kung Univ., Tainan (Taiwan)

A numerical solution for steady laminar natural convection of cold water in a vertical annulus with a constant-heat-flux heated inner wall and an isothermally cooled outer wall is examined. Results are generated for flow in annuli with aspect ratio 0.5 {le} A {le} 8, the radius ratio varying between 1.2 and 10, and the density inversion parameter ranging from {minus}2 and 1 for 10{sup 3} {le} Ra{sup *} {le} 10{sup 6}. The heat and fluid flow structures of cold water are vividly visualized by means of contour maps of heatlines and streamlines. The results clearly indicate that the mixed boundary conditions considered can have a significant influence on the geometric dependent of heat transfer characteristics and fluid flow structures in comparison with those reported for isothermal boundary conditions. Multicellular flow behavior of cold water can arise in a tall annulus of A = 8.

• OSTI ID: 5754370
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Vol. 112:1; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ANNULAR SPACE
NATURAL CONVECTION
CALCULATION METHODS
FLOW VISUALIZATION
FLUID FLOW
HEAT FLUX
SPACE DEPENDENCE
WATER
CONFIGURATION
CONVECTION
ENERGY TRANSFER
HEAT TRANSFER
HYDROGEN COMPOUNDS
MASS TRANSFER
OXYGEN COMPOUNDS
SPACE
420400* - Engineering- Heat Transfer & Fluid Flow