Behavior of thermal plumes from two-heat sources in an enclosure

The present paper describes the upward motion, the interaction and the impingement heat transfer to the upper wall of two thermal plumes from two heated sections on a horizontal plate. Numerical analysis was performed for dimensionless pitch Pi = 0.26, 0.50, 0.76 and 1.0, Grashof number Gr = 10 3–10...

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Bibliographic Details
Published inInternational journal of heat and mass transfer Vol. 48; no. 16; pp. 3461 - 3468
Main Authors Ichimiya, Koichi, Saiki, Hideyuki
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.07.2005
Elsevier
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Summary:The present paper describes the upward motion, the interaction and the impingement heat transfer to the upper wall of two thermal plumes from two heated sections on a horizontal plate. Numerical analysis was performed for dimensionless pitch Pi = 0.26, 0.50, 0.76 and 1.0, Grashof number Gr = 10 3–10 6 and Pr = 170. Numerical results show that the upward motion is divided into three patterns depending on the pitch of two heated sections. The first pattern is the unification of two thermal plumes like one for short pitch. The second one is the separate upward motion after the unification. The third one is the independent motion for long pitch. These patterns were investigated by visualization of thermosensitive liquid crystal suspension. The impingement local heat transfer on the upper wall is evaluated transiently for various Grashof numbers. Mean Nusselt number depends on Gr −0.16.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2005.02.038