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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

MEASUREMENT OF TURBULENT HEAT FLUX IN AN AIR-FILLED SQUARE CAVITY

Get access (open in a dialog) DOI: 10.1615/IHTC12.1880
6 pages

Résumé

The turbulent heat flux in an air-filled vertical square cavity was directly measured using a Laser Doppler Anemometer and a micro-diameter thermocouple. The cavity was 0.75 m high × 0.75 m wide × 1.5 m deep giving 2-D flow. The hot and cold walls of the cavity were isothermal at 50 °C and 10 °C respectively giving a Ra number of 1.58 × 109. The turbulent heat flux was systematically measured at different locations in the cavity and an experimentally obtained contour plot of the turbulent heat flux of the air flow in the cavity is reported for low turbulence natural convection in such cavities for the first time. The experiments were conducted with very high accuracy and as such the results can provide further insight into turbulent heat transfer, form experimental benchmark data and will be useful for validation of Computational Fluid Dynamics codes.