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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

EXPERIMENTAL AND THEORETICAL INVESTIGATION OF MIXED CONVECTION HEAT TRANSFER IN SHEAR-DRIVEN AND BUOYANCY-AIDED VERTICAL CAVITY

Get access (open in a dialog) DOI: 10.1615/IHTC10.3350
pages 525-530

Аннотация

A combined experimental and theoretical study has been carried out to investigate mixed convection heat transfer in vertical narrow cavities. The shear force is produced by a moving belt constituting a vertical wall of the cavity, and the thermal buoyancy force aids the shear induced flow. The physical model simulates systems which arise in materials processing applications. Experiments were performed in a test cell equipped with two heat exchangers and three thermocouple racks for measuring the temperature distribution at twelve different positions. The temperature field was scanned in the cavity for various flow and temperature boundary conditions. Two- and three-dimensional laminar and a two-dimensional low Reynolds number k—ε turbulence models were used to analyze the problem theoretically. The experimental temperature measurements were found to be in reasonably good agreement with the numerical predictions. For Reynolds numbers greater than 1000 the flow in the cavity is turbulent and three-dimensional flow and heat transfer model is needed to properly simulate transport in the system.