dorsal/arxiv
View SchemaOrientation changes of the large-scale circulation in turbulent Rayleigh-Benard convection
| Authors | Eric Brown, Alexei Nikoleanko, Guenter Ahlers |
|---|---|
| Categories | |
| ArXiv ID | physics/0503162 |
| URL | https://arxiv.org/abs/physics/0503162 |
| DOI | 10.1103/PhysRevLett.95.084503 |
Abstract
We present measurements of the orientation theta_0(t) of the large-scale circulation (LSC) of turbulent Rayleigh-Benard convection in cylindrical cells of aspect ratio 1. theta_0(t) undergoes irregular reorientations. It contains reorientation events by rotation through angles Delta theta with a monotonically decreasing probability distribution p(Delta theta), and by cessations (where the LSC stops temporarily) with a uniform p(Delta theta). Reorientations have Poissonian statistics in time. The amplitude of the LSC and the magnitude of the azimuthal rotation rate have a negative correlation.
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"abstract": "We present measurements of the orientation theta_0(t) of the large-scale\ncirculation (LSC) of turbulent Rayleigh-Benard convection in cylindrical cells\nof aspect ratio 1. theta_0(t) undergoes irregular reorientations. It contains\nreorientation events by rotation through angles Delta theta with a\nmonotonically decreasing probability distribution p(Delta theta), and by\ncessations (where the LSC stops temporarily) with a uniform p(Delta theta).\nReorientations have Poissonian statistics in time. The amplitude of the LSC and\nthe magnitude of the azimuthal rotation rate have a negative correlation.",
"arxiv_id": "physics/0503162",
"authors": [
"Eric Brown",
"Alexei Nikoleanko",
"Guenter Ahlers"
],
"categories": [
"physics.flu-dyn"
],
"doi": "10.1103/PhysRevLett.95.084503",
"title": "Orientation changes of the large-scale circulation in turbulent Rayleigh-Benard convection",
"url": "https://arxiv.org/abs/physics/0503162"
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