期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.074502
关键词
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资金
- Center for the Physics of Living Cells at the University of Illinois
- Center of Excellence for Physics of Geological Processes
- National Science Foundation [NSF-DMR-1044901]
We investigate the effect of weak rotation on the large-scale circulation (LSC) of turbulent Rayleigh-Benard convection, using the theory for cessations in a low-dimensional stochastic model of the flow previously studied. We determine the cessation frequency of the LSC as a function of rotation, and calculate the statistics of the amplitude and azimuthal velocity fluctuations of the LSC as a function of the rotation rate for different Rayleigh numbers. Furthermore, we show that the tails of the reorientation PDF remain unchanged for rotating systems, while the distribution of the LSC amplitude and correspondingly the cessation frequency are strongly affected by rotation. Our results are in close agreement with experimental observations.
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