B215 FLUID FLOW AND HEAT TRANSFER OF NATURAL CONVECTION AROUND HEATED VERTICAL CYLINDERS : EFECT OF CYLINDER DIAMETER
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概要
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Natural convective flows of water induced around heated vertical cylinders have been investigated experimentally. Special interests were paid to the influences of cylinder diameter on the turbulent transition and also on the local heat transfer characteristics of the cylinders. The diameters of the cylinders were varied systematically from 10 to 165mm. Visualizations of the flows around the cylinder and of the surface temperatures of the heated cylinders have been carried out to determine the onset of turbulent transition. The result showed that the onset of turbulent transition shifts toward downstream with decreasing the cylinder diameters, when, in particular, the diameters are smaller than 60mm. Moreover, the local heat transfer coefficients of the cylinder show marked increase in the both regions of laminar and turbulent flows with decreasing the diameters.
- 一般社団法人日本機械学会の論文
著者
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TACHIBANA Tatsuhiko
Dept. Bot., Grad. Sch. Sci., Kyoto Univ.
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Tachibana Tatsuhiko
Dept. Bot. Grad. Sch. Sci. Kyoto Univ.
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Tachibana Tatsuhiko
Department Of Mechanical And System Engineering Himeji Institute Of Technology
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Kitamura Kenzo
Dept. Of Mech. Eng. Toyohashi Univ. Of Tech.
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KIMURA Fumiyoshi
Dept. of Mech. and Sys. Eng., Himeji Inst. of Tech.
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HOSOKAWA Tsutomu
Dept. of Mech. and Sys. Eng., Himeji Inst. of Tech.
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Hosokawa Tsutomu
Department Of Mechanical And System Engineering Himeji Institute Of Technology
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Kimura Fumiyoshi
Department Of Mechanical And System Engineering Himeji Institute Of Technology
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Kimura Fumiyoshi
Dept. Of Mech. And Sys. Eng. Univ. Of Hyogo
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