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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

AN EXPERIMENTAL AND NUMERICAL INVESTIGATION OF MIXED CONVECTION IN A POROUS MEDIUM BETWEEN VERTICAL CONCENTRIC CYLINDERS

Get access (open in a dialog) DOI: 10.1615/IHTC9.2510
pages 477-482

Abstract

A numerical and experimental investigation of mixed convection in a porous medium between vertical concentric cylinders was conducted. The purpose of the study was to determine the impact of natural convection on the overall heat transfer between the cylinders for Darcy flow. The outer cylinder of the apparatus was maintained with either a constant wall temperature or a constant heat flux, and the inner cylinder was adiabatic. Water was used as the working fluid in a bed of 1 mm diameter glass or expanded ceramic media. Experimental data included radial and axial temperature profiles which were used to estimate local and overall heat transfer coefficients. Tests are reported with a Pe/Ra number range of 1 to 20 for the constant temperature cases, and from 0.2 to 10 for the constant heat flux cases. A two-dimensional finite element porous media code MARIAH was used to study numerically the mixed convection. Comparisons between the test and code results were quite good.