Numerical Modeling of Natural Convection Heat Transfer Around Horizontal Triangular Ducts

Journal Article

Al-Ansary, Hany . 2012

• Magazine \ Newspaper: Numerical Heat Transfer, Part A Applications
• Issue Number: 3
• Volume Number: 61
• Pages: 201-219

Publication Abstract

Laminar natural convection heat transfer from uniformly heated horizontal cylinders of triangular cross section is investigated numerically in air.  Different cylinder cross section dimensions and orientations are examined under laminar conditions. The computational procedure is based on the finite volume technique (using the commercial software FLOWORKS).  Results are presented in the form of streamline and temperature contour plots around the perimeter of the cylinders.  Some representations of thermal layers around the sides of the cylinders are obtained for different modified Rayleigh numbers.  Heat transfer data are generated and presented in terms of the average Nusselt number versus the modified Rayleigh number. General correlations of Nusselt numbers in terms of a wide range of the modified Rayleigh numbers are obtained to cover two different positions of the triangular cylinder. Symmetric, transition and asymmetric plumes are obtained and characterized for both positions of the cylinders.