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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

SIMULATION OF THE RAYLEIGH−BENARD CONVECTION IN A FINNED CAVITY FILLED WITH LIQUID GALLIUM

Get access (open in a dialog) pages 551-560
DOI: 10.1615/TFEC2018.cmd.021682

要約

Rayleigh-Benard convection driven by the temperature difference of horizontal top and bottom surfaces of a square cavity filled with liquid gallium, Pr=0.024, is studied numerically for Ra=105 and 3×105. Steady or unsteady, cellular flow structures and temperature patterns along with evolution of heat transfer rates (Nusselt number) are illustrated. The effect of fin length and placement on flow regime and heat transfer is established. Heat transfer rate reduction is obtained for all the cases considered. Most reduction occurs when pairs of adiabatic fins are placed on insulated walls and the least reduction with pair of fins located on cold surface. Short fins (lf=0.10) play a stabilizing role in some of the cases for Ra=3×105.