An experimental study of flows and heat transfer enhancements in an air-filled differentially heated cavity of vertical aspect ratio 4, is presented. The control mechanism employed in the present research consists in thermal disturbances produced by a thin tube located at the bottom of the hot wall. The effects of amplitude and of temperature frequency signals are investigated for two Rayleigh numbers. For the first value, just above the first bifurcation, the flow is periodical. For the second, the flow is turbulent. The results show details of flow structures, such as the spatial distribution of the local mean and fluctuating velocity, the evolution of the global and local Nusselt numbers. A more complex behaviour of the flow is observed than was anticipated.
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ASME/JSME 2007 5th Joint Fluids Engineering Conference
July 30–August 2, 2007
San Diego, California, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4288-6
PROCEEDINGS PAPER
Control of Natural Convection in a Differentially Heated Cavity With a Thermal Perturbation at the Hot Wall
Olivier Skurtys,
Olivier Skurtys
LET-ENSMA, Futuroscope, France
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Francois Penot
Francois Penot
LET-ENSMA, Futuroscope, France
Search for other works by this author on:
Olivier Skurtys
LET-ENSMA, Futuroscope, France
Francois Penot
LET-ENSMA, Futuroscope, France
Paper No:
FEDSM2007-37104, pp. 1479-1486; 8 pages
Published Online:
March 30, 2009
Citation
Skurtys, O, & Penot, F. "Control of Natural Convection in a Differentially Heated Cavity With a Thermal Perturbation at the Hot Wall." Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 1: Symposia, Parts A and B. San Diego, California, USA. July 30–August 2, 2007. pp. 1479-1486. ASME. https://doi.org/10.1115/FEDSM2007-37104
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