Numerical investigation of natural convection inside complex enclosures

Morsi, Yos S. and Das, Subrat 2003, Numerical investigation of natural convection inside complex enclosures, Heat transfer engineering, vol. 24, no. 2, pp. 30-41, doi: 10.1080/01457630304080.

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Title Numerical investigation of natural convection inside complex enclosures
Author(s) Morsi, Yos S.
Das, Subrat
Journal name Heat transfer engineering
Volume number 24
Issue number 2
Start page 30
End page 41
Total pages 12
Publisher Taylor & Francis
Place of publication Philadelphia, Pa.
Publication date 2003-03
ISSN 0145-7632
Keyword(s) buoyancy
finite element method
flow of fluids
flow patterns
heat transfer coefficients
Summary In this article, the analyses of heat transfer and free convective motion have been carried out numerically for various structures. The solution is based on a finite element method with the frontal solver to examine the flow parameters and heat transfer characteristics. Several dome configurations--such as flat, inclined, and dome shapes--are considered for the top of the enclosure. A general conic equation is considered to represent the dome as circular, elliptical, parabolic, or hyperbolic shape. The findings from this study indicate that the convective phenomenon is greatly influenced by the shape of the top cover dome and tends to form a secondary core even at a moderate Rayleigh number when compared with an equivalent rectangular enclosure. In addition, the circular and elliptical shapes of the dome give higher heat transfer rate. The effect of various "offset" of the dome and inclined roof on convective heat transfer is also found to be quite significant. However, beyond 0.3 of offset of the top cover for the dome and inclined roof, the change in overall heat transfer rate is minimal. The heat transfer coefficients of dome shaped and inclined roof enclosures are given and discussed.
Language eng
DOI 10.1080/01457630304080
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
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