Flows in enclosures have been studied for various applications. Transport in lower half heated upper half cooled enclosures becomes a focus of research recently due to its application on hydrothermal crystal growth. Natural convection flows in hydrothermal autoclaves are driven by the temperature differential on the enclosure walls; lower half hot and upper half cooled. Due to the difficulties associated with visualization of flow in cylindrical enclosures, flows were experimentally visualized in a rectangular model autoclave. In this study, flows and transport mechanisms in rectangular and cylindrical enclosures are studied numerically in the steady laminar flow regime. Flow structures and transport mechanisms are analyzed and compared. Parametric studies on aspect ratios are carried out for both enclosures. Results show that flows in rectangular and cylindrical enclosures have the same transports mechanism. Fluid in the wall layers in one half form streams that feed into the center of the other half. However, for two kinds of enclosures quantitative differences exist on the stream formation.
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ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
July 11–15, 2004
Charlotte, North Carolina, USA
Conference Sponsors:
- Heat Transfer Division and Fluids Engineering Division
ISBN:
0-7918-4693-8
PROCEEDINGS PAPER
Steady Laminar Flows in Lower Half Heated Upper Half Cooled Rectangular and Cylindrical Enclosures: Comparison of the Transport Mechanism
Minel J. Braun,
Minel J. Braun
University of Akron, Akron, OH
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Edward A. Evans,
Edward A. Evans
University of Akron, Akron, OH
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G.-X. Wang
G.-X. Wang
University of Akron, Akron, OH
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Hongmin Li
University of Akron, Akron, OH
Minel J. Braun
University of Akron, Akron, OH
Edward A. Evans
University of Akron, Akron, OH
G.-X. Wang
University of Akron, Akron, OH
Paper No:
HT-FED2004-56775, pp. 859-868; 10 pages
Published Online:
February 24, 2009
Citation
Li, H, Braun, MJ, Evans, EA, & Wang, G. "Steady Laminar Flows in Lower Half Heated Upper Half Cooled Rectangular and Cylindrical Enclosures: Comparison of the Transport Mechanism." Proceedings of the ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. Volume 4. Charlotte, North Carolina, USA. July 11–15, 2004. pp. 859-868. ASME. https://doi.org/10.1115/HT-FED2004-56775
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