Multiple transitions in rotating turbulent Rayleigh-Bénard convection.
Multiple transitions in rotating turbulent Rayleigh-Bénard convection.
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旋转湍流瑞利-贝纳德对流中的多重转变
DOI:
10.1103/physrevlett.114.114506
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发表时间:
2015
影响因子:
8.6
通讯作者:
G. Ahlers
中科院分区:
文献类型:
--
作者:
P. Wei;S. Weiss;G. Ahlers
Sometimes it is thought that sharp transitions between potentially different turbulent states should be washed out by the prevailing intense fluctuations and short coherence lengths and times. Contrary to this expectation, we found asequenceof such transitions in turbulent rotating Rayleigh-Bénard convection as the rotation rate was increased. This phenomenon was observed in cylindrical samples with aspect ratios (diameter/height)and 0.50. It became most prominent at very large Rayleigh numbers up to, where the fluctuations are extremely vigorous, and was manifested most clearly for. It was found in the heat transport as well as in the temperature gradient near the sample center. We conjecture that the transitions are between different large-scale structures which involve changes of symmetry and thus cannot be gradual [L. Landau, Zh. Eksp. Teor. Fiz. 7, 19 (1937); L. D. Landau, Phys. Z. Sowjetunion 11, 26 (1937); L. D. Landau, in Collected Papers of L. D. Landau, (Oxford University Press, Oxford, 1965), pp. 193–216].
DOI:
10.1097/01.ccm.0000550828.76036.ba
发表时间:
2012
期刊:
The Hatak Witches
影响因子:
--
作者:
Carter Ratcliff
通讯作者:
Carter Ratcliff