Heat transport measurements in turbulent rotating Rayleigh-Benard convection [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 2008.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Additional Creators:
- Los Alamos National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information - Access Online:
- www.osti.gov
- Summary:
- We present experimental heat transport measurements of turbulent Rayleigh-Benard convection with rotation about a vertical axis. The fluid, water with Prandtl number (σ) about 6, was confined in a cell which had a square cross section of 7.3 cm x 7.3 cm and a height of 9.4 cm. Heat transport was measured for Rayleigh numbers 2 x 10⁵ < Ra < 5 x 10⁸ and Taylor numbers 0 < Ta < 5 x 10⁹. We show the variation of normalized heat transport, the Nusselt number, at fixed dimensional rotation rate Ω{sub D}, at fixed Ra varying Ta, at fixed Ta varying Ra, and at fixed Rossby number Ro. The scaling of heat transport in the range 10⁷ to about 10⁹ is roughly 0.29 with a Ro dependent coefficient or equivalently is also well fit by a combination of power laws of the form a Ra{sup 1/5} + b Ra{sup 1/3} . The range of Ra is not sufficient to differentiate single power law or combined power law scaling. The overall impact of rotation on heat transport in turbulent convection is assessed.
- Note:
- Published through SciTech Connect.
01/01/2008.
"la-ur-08-06538"
" la-ur-08-6538"
Physical Review E ISSN 1539-3755 FT
Liu, Yuanming; Ecke, Robert E. - Funding Information:
- AC52-06NA25396
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