Self-sustained large-scale flow in turbulent cryogenic convection

J. J. Niemela; L. Skrbek; K. R. Sreenivasan; R. J. Donnelly

doi:10.1023/A:1013784732498

Self-sustained large-scale flow in turbulent cryogenic convection

J. J. Niemela, L. Skrbek, K. R. Sreenivasan, R. J. Donnelly

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Abstract

Turbulent convection is studied in a cell filled with cryogenic helium gas. At high Rayleigh numbers a large-scale circulation persists and has a size comparable to the container. Over a wide range of time scales greater than its characteristic turnover time, this mean flow exhibits occasional and irregular reversals of direction without a change in magnitude. We study this feature in an apparatus of aspect ratio unity, in which the highest attainable Rayleigh number is about 10¹⁶.

Original language	English (US)
Pages (from-to)	297-302
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	126
Issue number	1-2
DOIs	https://doi.org/10.1023/A:1013784732498
State	Published - 2002

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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abstract = "Turbulent convection is studied in a cell filled with cryogenic helium gas. At high Rayleigh numbers a large-scale circulation persists and has a size comparable to the container. Over a wide range of time scales greater than its characteristic turnover time, this mean flow exhibits occasional and irregular reversals of direction without a change in magnitude. We study this feature in an apparatus of aspect ratio unity, in which the highest attainable Rayleigh number is about 1016.",

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AU - Skrbek, L.

AU - Sreenivasan, K. R.

AU - Donnelly, R. J.

PY - 2002

Y1 - 2002

N2 - Turbulent convection is studied in a cell filled with cryogenic helium gas. At high Rayleigh numbers a large-scale circulation persists and has a size comparable to the container. Over a wide range of time scales greater than its characteristic turnover time, this mean flow exhibits occasional and irregular reversals of direction without a change in magnitude. We study this feature in an apparatus of aspect ratio unity, in which the highest attainable Rayleigh number is about 1016.

AB - Turbulent convection is studied in a cell filled with cryogenic helium gas. At high Rayleigh numbers a large-scale circulation persists and has a size comparable to the container. Over a wide range of time scales greater than its characteristic turnover time, this mean flow exhibits occasional and irregular reversals of direction without a change in magnitude. We study this feature in an apparatus of aspect ratio unity, in which the highest attainable Rayleigh number is about 1016.

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Self-sustained large-scale flow in turbulent cryogenic convection

Abstract

ASJC Scopus subject areas

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