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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 22, No. 39 >

内部縦フィン付き管の十分に発達した層流強制対流熱伝達


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Title: 内部縦フィン付き管の十分に発達した層流強制対流熱伝達
Other Titles: Numerical Analysis on Fully Developed Laminar Forced Convective Heat Transfer in Circular Tube with Internal Longitudinal Fins
Authors: 金丸, 邦康 / 川江, 信治 / 茂地, 徹 / 山田, 岹
Authors (alternative): Kanemaru, Kuniyasu / Kawae, Nobuji / Shigechi, Toru / Yamada, Takashi
Issue Date: Jul-1992
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, 22(39), pp.103-108; 1992
Abstract: Fully developed laminar forced convective heat transfer in a circular tube with internal longitudinal fins is analyzed using the finite difference method, with the proviso that the flow is also fully developed. We adopt two kinds of thermal boundary conditions at the outer wall of the tube: constant wall temperatures and uniform heat fluxes. Extended Nusselt numbers based on the outer wall temperature are compared for the wide range of the geometrical parameters and the follwing results are summarized: (1) The equivalent diameter of the conduit affects the velocity profile of the fluid and the resulting flow pattern controls the heat transfer mechanism. (2) When the thermal conductivity ratio of the fluid to the tube material is small, the heat transfer augmentation by the fins is not effective. (3) When the thermal conductivity ratio of the fluid to the tube material lied in the order of 100, the effect of wall thickness on the heat transfer coefficient can be neglect. Furthermore when this ratio is greater than 500, the thermal resistance of the fin can be ignored in respect to the heat transfer.
URI: http://hdl.handle.net/10069/24372
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 22, No. 39

Citable URI : http://hdl.handle.net/10069/24372

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