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TECHNICAL PAPERS: Natural and Mixed Convection

Visualization and Prediction of Natural Convection of Water Near Its Density Maximum in a Tall Rectangular Enclosure at High Rayleigh Numbers

[+] Author and Article Information
C. J. Ho, F. J. Tu

Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101, ROC

J. Heat Transfer 123(1), 84-95 (Jul 20, 2000) (12 pages) doi:10.1115/1.1336511 History: Received December 09, 1999; Revised July 20, 2000
Copyright © 2001 by ASME
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References

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Nishimura,  T., Hayashida,  Y., Mineoka,  M., and Wake,  A., 1997, “Oscillatory Natural Convection of Water Near the Density Extremum at High Rayleigh Numbers,” Int. J. Heat Mass Transf., 40, pp. 3449–3465.
Ho,  C. J., and Tu,  F. J., 1999, “Numerical Study on Oscillatory Convection of Cold Water in a Tall Vertical Enclosure,” Int. J. Numer. Methods Heat Fluid Flow, 9, pp. 487–508.
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Figures

Grahic Jump Location
Schematic diagram of the physical configuration and coordinate systems  
Grahic Jump Location
Photographs of the transient evolution of the flow structre (upper) and temperature field (lower) at (a) Fo=0.023 (t=2 min and 30 sec), (b) Fo=0.054(t=6 min), (c) Fo=0.077 (t=8 min and 30 sec), and (d) Fo=0.127(t=14 min) for θm=0.5,RaW=3.454×105
Grahic Jump Location
Two-dimensional prediction of transient streamlines (upper) and isotherms (lower) in the cold-water-filled enclosure for θm=0.5,RaW=3.454×105
Grahic Jump Location
Three-dimensional prediction of transient cross-sectional (x-y midplane) flow (upper) and temperature (lower) fields in the cold-water-filled enclosure for θm=0.5,RaW=3.454×105 with Az=2
Grahic Jump Location
Photographs of the flow structure (upper) and temperature field (lower) of the oscillatory convection in the cold-water-filled enclosure at θm=0.5,RaW=3.454×105
Grahic Jump Location
Predicted cyclic flow (upper) and temperature (lower) fields of the oscillatory convection in the cold-water-filled enclosure by the two-dimensional numerical simulation at θm=0.5,RaW=3.454×105
Grahic Jump Location
Steady state cross-sectional (x-y midplane) (a) flow and (b) temperature fields predicted by the three-dimensional numerical simulation at θm=0.5,RaW=3.454×105 with Az=2
Grahic Jump Location
Comparison of the steady state flow patterns (upper) and temperature fields (lower) among (a) visualization experiment, (b) three-dimensional (Az=2), and (c) two-dimensional simulations at θm=0.5,RaW=5.957×105
Grahic Jump Location
Comparison of the steady state flow patterns (upper) and temperature fields (lower) among (a) visualization experiment, (b) three-dimensional (Az=2), and (c) two-dimensional simulations at θm=0.4,RaW=2.522×105
Grahic Jump Location
Periodic variations of the flow structure (upper) and temperature field (lower) predicted by two-dimensional simulation at θm=0.4,RaW=5.437×105

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