Numerical Study Of Forced Convection Around
Heated Horizontal Triangular Ducts
Author(s)
O. Zeitoun, M. E. Ali & A. Nuhait
Abstract
Laminar forced convection heat transfer around horizontal triangular cross
section ducts in air is investigated numerically. Equilateral triangle ducts of
different cross section dimensions are investigated. The ducts are positioned such
that the vertex of the triangle is facing the flow. The computational procedure is
based on the finite element technique. Results are presented in the form of
streamlines and temperature contour plots around the circumference of the ducts.
Heat transfer data are generated and presented in terms of the average Nusselt
number versus the Reynolds number, and the drag coefficient is also presented
versus the Reynolds number and validated by comparing with that of a circular
cylinder in cross flow. General correlations of Nusselt numbers in terms of wide
ranges of the Reynolds number are obtained. Comprehensive discussion is also
reported about the development of wakes downstream at the rear of the ducts.
Keywords: forced convection, heat transfer, laminar heat transfer, horizontal
non-circular duct, triangular duct.
1 Introduction
Triangular ducts in cross flow have many engineering applications in the cooling
of electronic components and heat exchangers. A survey of the literature shows
that correlations for the overall averaged Nusselt numbers for forced convection
heat transfer from circular and non-circular cylinders have been reported by
different authors. Churchill and Bernstein [1] have reported a single
comprehensive equation that cover the entire range of Reynolds numbers for a
circular cylinder in cross flow for a wide range of Prandtl numbers as follows:
Keywords
forced convection, heat transfer, laminar heat transfer, horizontal
non-circular duct, triangular duct
Related Book
Other papers in this volume
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