A key subject of interest for technologies that involve flows of fluids at the supercritical thermodynamic state is the development of prediction methods that capture the fluid dynamics and convection heat transfer at this state. Due to the elevated temperatures and pressures associated with certain working fluids at this thermodynamic state, surrogate fluids are often used as substitutes for performing experiments during the design stages of prototype development. The success of this approach depends on the development of similarity criteria or fluid-to-fluid models. Similarity criteria for mixed-convection heat transfer in supercritical fluids are proposed based on a set of nondimensional dynamic similarity parameters and state-space parameters developed through our current understanding of the physical mechanisms that affect heat transfer in fluids at this state. The proposed similarity criteria are successfully validated using data from ducted flows of supercritical fluids with configurations having upstream, downstream, or wall-normal-oriented gravitational acceleration.
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December 2017
This article was originally published in
Journal of Heat Transfer
Research-Article
Similarity Criteria for Modeling Mixed-Convection Heat Transfer in Ducted Flows of Supercritical Fluids
Chukwudi Azih,
Chukwudi Azih
Department of Mechanical and
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
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Metin I. Yaras
Metin I. Yaras
Department of Mechanical and
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
e-mail: metin_yaras@carleton.ca
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
e-mail: metin_yaras@carleton.ca
Search for other works by this author on:
Chukwudi Azih
Department of Mechanical and
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
Metin I. Yaras
Department of Mechanical and
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
e-mail: metin_yaras@carleton.ca
Aerospace Engineering,
Carleton University,
Ottawa, ON K1S 5B6, Canada
e-mail: metin_yaras@carleton.ca
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 9, 2016; final manuscript received March 18, 2017; published online June 27, 2017. Assoc. Editor: Amitabh Narain.
J. Heat Transfer. Dec 2017, 139(12): 122501 (13 pages)
Published Online: June 27, 2017
Article history
Received:
September 9, 2016
Revised:
March 18, 2017
Citation
Azih, C., and Yaras, M. I. (June 27, 2017). "Similarity Criteria for Modeling Mixed-Convection Heat Transfer in Ducted Flows of Supercritical Fluids." ASME. J. Heat Transfer. December 2017; 139(12): 122501. https://doi.org/10.1115/1.4036689
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