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DIRECT EXCHANGE AREAS FOR AN INFINITE RECTANGULAR DUCT BY DISCRETE-ORDINATES METHOD

DOI: 10.1615/ICHMT.1995.RadTransfProc.140

K. H. Byun
Department of Mechanical Engineering, Dongguk University, Seoul 100-715, Republic of Korea

Theodore F. Smith
Department of Mechanical Engineering, The University of Iowa, Iowa City, Iowa 52242, USA

要約

The purpose of this study is to compute direct exchange areas (DEA) for an infinite rectangular duct by using the discrete-ordinates method. DEA's of a system with or without shading are calculated. The effects of optical thickness as well as the number of spatial and angular divisions on the accuracy of the DEA results are studied. As optical thickness increases at a given spatial and angular divisions, the errors increase. For a given optical thickness, the errors are reduced as the number of spatial and angular divisions increase. If there is shading in the system, the accuracy of the results depends on both the number of spatial and angular divisions.

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