TY - JOUR
T1 - The wind in confined thermal convection
AU - Niemela, J. J.
AU - Skrbek, L.
AU - Sreenivasan, K. R.
AU - Donnelly, R. J.
PY - 2001/12/25
Y1 - 2001/12/25
N2 - A large-scale circulation velocity, often called the 'wind', has been observed in turbulent convection in the Rayleigh-Bénard apparatus, which is a closed box with a heated bottom wall. The wind survives even when the dynamical parameter, namely the Rayleigh number, is very large. Over a wide range of time scales greater than its characteristic turnover time, the wind velocity exhibits occasional and irregular reversals without a change in magnitude. We study this feature experimentally in an apparatus of aspect ratio unity, in which the highest attainable Rayleigh number is about 1016. A possible physical explanation is attempted.
AB - A large-scale circulation velocity, often called the 'wind', has been observed in turbulent convection in the Rayleigh-Bénard apparatus, which is a closed box with a heated bottom wall. The wind survives even when the dynamical parameter, namely the Rayleigh number, is very large. Over a wide range of time scales greater than its characteristic turnover time, the wind velocity exhibits occasional and irregular reversals without a change in magnitude. We study this feature experimentally in an apparatus of aspect ratio unity, in which the highest attainable Rayleigh number is about 1016. A possible physical explanation is attempted.
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U2 - 10.1017/S0022112001006310
DO - 10.1017/S0022112001006310
M3 - Article
AN - SCOPUS:0035951043
SN - 0022-1120
VL - 449
SP - 169
EP - 178
JO - Journal of Fluid Mechanics
JF - Journal of Fluid Mechanics
ER -