年間 4 号発行
ISSN 印刷: 1065-3090
ISSN オンライン: 1940-4336
Indexed in
FLOW VISUALIZATION AND FREE CONVECTION HEAT TRANSFER AT THE JUNCTION OF SHORT CYLINDERS MOUNTED ON A HEATED WALL
要約
Unsteady free convection in the vicinity of vertical wall-mounted insulated short cylinders is considered under isoflux thermal conditions used for wall heating. Especially, this study is aimed at analyzing how free convection heat transfer at the wall can be locally modified by the presence of a short protrusion. For this purpose, the idea is to correlate local heat transfer at a given abscissa on the wall with the flow patterns at the junction for a large range of angular cylinder positions a around this abscissa. In contrast to a circular shape, it is shown that the presence of a cylinder with sharp edges embedded in a free-convection boundary layer induces heat transfer enhancement at a given abscissa for a < 50°. It is argued that flow visualization can be a powerful technique in the understanding of the complex local heat transfer process, especially by identifying both the position of the wake separation and the rotational flow features.
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Malah Hamid, Chumakov Yurii S., Levchenya Alexander M., A study of the vortex structures around circular cylinder mounted on vertical heated plate, 1959, 2018. Crossref
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Fohanno S., Korichi A., Polidori G., Visualizations of the unsteady interaction of opposite buoyancy induced flows, Heat and Mass Transfer, 43, 10, 2007. Crossref
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Malah Hamid, Chumakov Yuri Sergeevich, Sadeghian Esmail, The effects of the cross-section shape of the surface-mounted cylinder on the free convective junction flow, Engineering Science and Technology, an International Journal, 27, 2022. Crossref