NUMERICAL ANALYSIS OF NATURAL CONVECTIVE AND RADIATIVE HEAT TRANSFER IN AN ARBITRARILY SHAPED ENCLOSURE

NUMERICAL ANALYSIS OF NATURAL CONVECTIVE AND RADIATIVE HEAT TRANSFER IN AN ARBITRARILY SHAPED ENCLOSURE

The flow and thermal characteristics of the interactions of natural convection and radiation in an enclosure containing circular ducts are analyzed numerically. For calculation of flow fields, the SIMPLE algorithm originally developed in Cartesian coordinates is extended and modified to apply to the...

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Bibliographic Details
Published in:Numerical heat transfer. Part A, Applications Vol. 34; no. 5; pp. 553 - 569
Main Authors: Hi-YongPak, Park, Kyoung-Woo
Format: Journal Article
Language:English
Published: London Taylor & Francis Group 01-10-1998
Taylor & Francis
Subjects:
Algorithms
Applied sciences
Convection and heat transfer
Ducts
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Finite volume method
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Heat radiation
Heat transfer
Physics
Problem solving
Theoretical studies. Data and constants. Metering
Thermal radiation
Turbulent flows, convection, and heat transfer
Streamlines
Nusselt number
Digital simulation
Finite volume method
Natural convection
Velocity distribution
Enclosure
High temperature
Heat transfer coefficient
Cavity flow
Thermal radiation
Radiative transfer
Optical thickness
Heat transfer
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Summary:The flow and thermal characteristics of the interactions of natural convection and radiation in an enclosure containing circular ducts are analyzed numerically. For calculation of flow fields, the SIMPLE algorithm originally developed in Cartesian coordinates is extended and modified to apply to the curvilinear coordinates system. The radiation part of the problem for an arbitrarily shaped domain is solved by using the finite volume method (FVM). Cartesian velocity components are used as the dependent variables in momentum equations, and a nonstaggered grid system is employed. The flow and thermal fields for an irregular geometry are investigated for the variation of such parameters as scattering albedo, optical thickness, and Planck number. The test problem is compared with both the exact solutions and the discrete ordinates method solution. The results show that the FVM is an effective method to predict radiative heat transfer processes in irregular geometries and that the change of optical thickness has more effect than that of scattering albedo on flow and thermal fields.
Bibliography:ObjectType-Article-2
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ISSN:1040-7782
1521-0634
DOI:10.1080/10407789808914003