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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

NUMERICAL AND EXPERIMENTAL STUDY OF NATURAL CONVECTION IN DIFFERENTIALLY HEATED CAVITIES

Get access (open in a dialog) DOI: 10.1615/IHTC13.p6.470
12 pages

摘要

In this work, numerical and experimental studies of the natural convection heat transfer in a thermal cavity with one of the vertical walls cooled and the other heated, were carried out. The upper and lower walls are insulated. The influences of the thermal gradient in the walls, the aspect ratio and inclination angle of the cavity on the flow and heat transfer were verified. The numerical solution was obtained by using a computational code based on the finite control volume method. The pressure-velocity coupling was achieved by the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) scheme. The flow was considered laminar, two-dimensional, incompressible and in steady state. The physical properties were considered constant and Boussinesq's hypothesis was adopted. Non-uniform and structured meshes more refined near the walls were used and the numerical results for velocity and temperature fields in the half depth cross section were obtained, as well as the temperature profiles at half height of the cavity. Thermocouples and a data acquisition system controlled by computer were used to accomplish the temperature measurements and a flow visualization test with smoking trace technique was carried out. Finally, a comparison between some numerical and experimental results was performed and a fair agreement was found.