Natural convection from isothermal cubical cavities with a variety of side-facing apertures

Journal Article · Fri May 01 04:00:00 EDT 1987 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3248095· OSTI ID:6078499

Clausing, A M; Waldvogel, J M; Lister, L D ^[1]

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1. Univ. of Illinois, Urbana (United States)

An experimental investigation of heat transfer by natural convection from a smooth, isothermal cubic cavity with a variety of side-facing aperatures is described in this paper. The study was motivated by the desire to predict the convective loss from large solar thermal-electric receivers and to understand the mechanisms which control this loss. Hence, emphasis is placed on the large Rayleigh number, Ra, regime with large ratios of the cavity wall temperature T{sub w} to the ambient temperature T{sub {infinity}}. A cryogenic wind tunnel with test section temperatures which are varied between 80 K and 310 K is used to facilitate deduction of the influences of the relevant parameters and to obtain large temperature ratios without masking the results by radiative heat transfer. A 0.4-m cubic cavity, which is mounted in the side wall of this tunnel, is used. The area of the aperture A{sub a} and its location are key variables in this study. The data which are presented cover the ranges: 1 < T{sub w}/T{sub {infinity}} < 3, L{sup 2}/18 {le} A{sub a} {le} L{sup 2}, and 3 {times} 10{sup 10}.

• OSTI ID: 6078499
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 109:2; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors &amp; Concentrators
CAVITY RECEIVERS
CONVECTION
CRYOGENICS
DATA
ENERGY TRANSFER
EXPERIMENTAL DATA
HEAT TRANSFER
INFORMATION
MASS TRANSFER
NATURAL CONVECTION
NUMERICAL DATA
SCALE MODELS
SOLAR RECEIVERS
STRUCTURAL MODELS
TUNNELS
UNDERGROUND FACILITIES
WIND TUNNELS