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Type: Artigo
Title: Analytical prediction of friction factors and Nusselt numbers of turbulent forced convection in rod bundles with smooth and rough surfaces
Author(s)/Inventor(s): Su, Jian
Freire, Atila Pantaleão Silva
Abstract: Indisponível.
Abstract: A simple analytical method was developed for the prediction of the friction factor, f, of fully developed turbulent flow and the Nusselt number, Nu, of fully developed turbulent forced convection in rod bundles arranged in square or hexagonal arrays. The friction factor equation for smooth rod bundles was presented in a form similar to the friction factor equation for turbulent flow in a circular pipe. An explicit equation for the Nusselt number of turbulent forced convection in rod bundles with smooth surface was developed. In addition, we extended the analysis to rod bundles with rough surface and provided a method for the prediction of the friction factor and the Nusselt number. The method was based on the law of the wall for velocity and the law of the wall for the temperature, which were integrated over the entire flow area to yield algebraic equations for the prediction of f and Nu. The present method is applicable to infinite rod bundles in square and hexagonal arrays with low pitch to rod diameter ratio, P/D<1.2.
Keywords: Turbulent flow
Friction factor
Law of the wall
Production unit: Núcleo Interdisciplinar de Dinâmica dos Fluidos
Publisher: Elsevier
In: Nuclear Engineering and Design
Volume: 217
Issue: 1-2
Issue Date: 2-May-2002
DOI: 10.1016/S0029-5493(02)00155-3
Publisher country: Brasil
Language: eng
Right access: Acesso Aberto
ISSN: 0029-5493
Appears in Collections:Engenharias

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