Natural convection-radiation interactions in a cube filled with a nongray gas

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Numerical Heat Transfer, Part A: Applications; (USA)

DOI:https://doi.org/10.1080/10407789108944846· OSTI ID:5554341

Fusegi, T; Ishii, K ^[1]; Farouk, B ^[2]; Kuwahara, K ^[3]

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1. Inst. of Computational Fluid Dynamics, 1-22-3 Haramachi, Meguro, Tokyo 152 (JP)
2. Drexel Univ., Philadelphia, PA (USA). Dept. of Mechanical Engineering and Mechanics
3. Inst. of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229 (JP)

A three-dimensional numerical study was performed on interactions of natural convection and radiation in a cubical enclosure filled with carbon dioxide gas. The enclosure was heated differentially by two opposing vertical walls. Gas radiation was analyzed by the P{sub L} differential approximation method and the weighted sum of gray gas model. Computations were carried out over a range of the Rayleigh number, Ra, between 10{sup 5} and 10{sup 9}. The Prandtl number and the overheat ratio were held fixed at 0.68 and 1.0, respectively. Unsteady transitional flows were computed by a direct simulation method, without using any explicit turbulence models. From the predictions, a mean heat transfer correlation has been proposed as Nu = 0.323 Ra{sup 0.342} in the surface/gas radiation mode, where Nu is the time and spatially averaged Nusselt number at the isothermal walls.

• OSTI ID: 5554341
• Journal Information: Numerical Heat Transfer, Part A: Applications; (USA), Journal Name: Numerical Heat Transfer, Part A: Applications; (USA) Vol. 19:2; ISSN 1040-7782; ISSN NHAAE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CONVECTION
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
NATURAL CONVECTION
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
THERMAL RADIATION
THERMODYNAMICS