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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/13571

Title: Numerical investigation of natural convection around isothermal horizontal rectangular ducts
Authors: Zeitoun, O.
Ali, M.
Keywords: Ducts; Finite element method; Heat transfer; Isotherms; Nusselt number; Rayleigh fading; Thermal effects
Issue Date: 2006
Publisher: Elsevier
Citation: Numerical Heat Transfer; Part A: Applications Volume 50, Issue 2, 1 March 2006, Pages 189-204
Abstract: Two-dimensional laminar natural-convection heat transfer in air around horizontal ducts with rectangular and square cross sections is studied numerically. Different aspect ratios are used for wide ranges of Rayleigh numbers. Results are presented in the form of streamlines and isothermal plots around the circumference of the ducts. The computational procedure is based on the finite-element technique. Temperature and velocity profiles are obtained near each surface of the ducts. Reverse flow and circulations are observed at high aspect ratios. Heat transfer data are generated and presented in terms of Nusselt number versus Rayleigh number for different aspect ratios. Correlation covering the aspect ratios used is obtained in dimensionless form of Nusselt number, Rayleigh number, and aspect ratio.
URI: http://hdl.handle.net/123456789/13571
ISSN: 10407782
Appears in Collections:College of Engineering

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