Turbulent natural convection-nongray gas radiation analysis in a square enclosure

Journal Article · Fri May 24 04:00:00 EDT 1996 · Numerical Heat Transfer. Part A, Applications

DOI:https://doi.org/10.1080/10407789608913813· OSTI ID:267930

Mesyngier, C; Farouk, B ^[1]

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1. Drexel Univ., Philadelphia, PA (United States). Dept. of Mechanical Engineering and Mechanics

A numerical study of the turbulent natural convection-radiation interaction and the associated heat transfer in a square enclosure with differentially heated vertical walls and insulated horizontal walls is reported. The enclosure is either filled with a single participating gas (H{sub 2}O or CO{sub 2}) or a homogeneous mixture of two participating gases along with a diluent (N{sub 2}). A two-dimensional computational domain was used to simulate the steady state turbulent flow within the enclosure. The surface and gas radiation were treated by the discrete ordinates method. The wavelength dependent radiative properties of the gases were considered by the weighted sum of gray gases model. A new correlation relating Nusselt number at the isothermal vertical walls as a function of the Rayleigh number and optical thickness of the medium is proposed. Detailed information about heat transfer variations along the length of the vertical walls is also given. The results are compared with previous numerical data obtained by other radiation models for similar problems.

• Sponsoring Organization: USDOE
• OSTI ID: 267930
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 7 Vol. 29; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CALCULATION METHODS
FURNACES
NATURAL CONVECTION
RADIANT HEAT TRANSFER
TURBULENT FLOW