Background. An experimental study of buoyancy driven convection heat transfer in an open cavity was conducted. Method of Approach. Test cavities were constructed with calorimeter plates bonded to Styrofoam insulation. The inside of the cavities was heated and then exposed to ambient air for approximately thirty minutes. Different size cavities were examined at inclination angles of 0, 45, and . The heat transfer coefficient was determined from an energy balance on each calorimeter plate. The cavity’s plate temperatures varied spatially due to the transient nature of the tests. A parameter describing the nonisothermal cavity wall temperature variation was defined in order to compare with isothermal cavity heat transfer results. Results. Results showed that the cavity Nusselt number, based on a cavity averaged temperature, was insensitive to the transient development of nonisothermal conditions within the cavity. Comparison of cavity-average Nusselt number for the current study, where the Rayleigh number ranged from to , to data from the literature showed good agreement. Cavity-average Nusselt number relations for inclination angles of 0, 45, and in the form of resulted in coefficients of 0.091, 0.105, 0.093, respectively. The inclination angle orientation yielded the largest Nusselt numbers, which was similar to previous literature results. Trends in the local plate Nusselt numbers were examined and found similar to data from the literature.
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Localized Heat Transfer in Buoyancy Driven Convection in Open Cavities
Wilson Terrell, Jr.,
Wilson Terrell, Jr.
Department of Engineering Science,
e-mail: wilson.terrelljr@trinity.edu
Trinity University
, One Trinity Place, San Antonio, TX 78212-7200
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Ty A. Newell
Ty A. Newell
Air Conditioning and Refrigeration Center, Department of Mechanical and Industrial Engineering,
University of Illinois at Urbana-Champaign
, 140 MEB, MC-244, 1206 West Green Street, Urbana, IL 61801
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Wilson Terrell, Jr.
Department of Engineering Science,
Trinity University
, One Trinity Place, San Antonio, TX 78212-7200e-mail: wilson.terrelljr@trinity.edu
Ty A. Newell
Air Conditioning and Refrigeration Center, Department of Mechanical and Industrial Engineering,
University of Illinois at Urbana-Champaign
, 140 MEB, MC-244, 1206 West Green Street, Urbana, IL 61801J. Heat Transfer. Feb 2007, 129(2): 167-178 (12 pages)
Published Online: August 16, 2006
Article history
Received:
January 27, 2005
Revised:
August 16, 2006
Citation
Terrell, W., Jr., and Newell, T. A. (August 16, 2006). "Localized Heat Transfer in Buoyancy Driven Convection in Open Cavities." ASME. J. Heat Transfer. February 2007; 129(2): 167–178. https://doi.org/10.1115/1.2401615
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