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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 13, No. 21 >


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Title: 非等温乱流場の熱伝達問題における渦拡散係数について
Other Titles: On the Heat Convection with Approximate Eddy Diffusivity in the Non-Isothermal Turbulent Flow
Authors: 福地, 信義
Authors (alternative): Fukuchi, Nobuyoshi
Issue Date: Aug-1983
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, 13(21), pp.187-194; 1983
Abstract: The flow in enclosed non-isothermal space such as air-conditioned room is considered desirably as non-isotropic turbulent flow due to gravitational effects. In this case, the Reynolds stresses and the heat flux terms in the transport equations induced by time-mean should be treated as non-isotropical values including buoyant effects of a gravitational field. The approximate method based on the expression by Launder et al is used in the analyses of this paper. Namely, the Reynolds stresses and the heat flux terms are expressed algebraically by the use of buoyant effects in addition to eddy kinematic viscosity and eddy diffusivity of isotropic turbulent flow. In order to investigate the justice of this method, the calculation about free shear flow, jets and turbulent flow in pipe are carried out. The calculated flow velocity and air temperature by three dimensional analyses of finite element method are compared with the measured values in air conditioning chamber of container type.
URI: http://hdl.handle.net/10069/24112
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 13, No. 21

Citable URI : http://hdl.handle.net/10069/24112

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