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Self-sustained process at large scales in turbulent channel flow

Hwang, Yongyun and Cossu, Carlo Self-sustained process at large scales in turbulent channel flow. (2010) Physical Review Letters, vol. 105 (n° 4). pp. 1-4. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.105.044505

Abstract

Large-scale motions, important in turbulent shear flows, are frequently attributed to the interaction of structures at smaller scales. Here we show that, in a turbulent channel at Reτ≈550, large-scale motions can self-sustain even when smaller-scale structures populating the near-wall and logarithmic regions are artificially quenched. This large-scale self-sustained mechanism is not active in periodic boxes of width smaller than Lz≈1.5h or length shorter than Lx≈3h which correspond well to the most energetic large scales observed in the turbulent channel.

Item Type:Article
Additional Information:Thanks to American Institute of Physics editor. The original PDF of the article can be found at Physical Review Letters website : http://prl.aps.org/
HAL Id:hal-00925804
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Ecole Polytechnique (FRANCE)
Laboratory name:
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Deposited By: Carlo COSSU
Deposited On:08 Jan 2014 14:51

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