 |
university of Provence - Aix-Marseille I |  |
|
university of Provence - Aix-Marseille I | |
| HAL: hal-00521759, version 1 |
| arXiv: 1009.5617 |
| DOI: 10.1103/PhysRevLett.105.145001 |
| Detailed view |  Export this paper |
 |
| Physical Review Letters 105 (2010) 145001 |
|
|
|
|
| Origin of Lagrangian Intermittency in Drift-Wave Turbulence |
|
|
| Benjamin Kadoch 1Wouter J.T. Bos 2 |
|
|
| (2010-09-27) |
|
|
|
| The Lagrangian velocity statistics of dissipative drift-wave turbulence are investigated. For large values of the adiabaticity (or small collisionality), the probability density function of the Lagrangian acceleration shows exponential tails, as opposed to the stretched exponential or algebraic tails, generally observed for the highly intermittent acceleration of Navier-Stokes turbulence. This exponential distribution is shown to be a robust feature independent of the Reynolds number. For small adiabaticity, algebraic tails are observed, suggesting the strong influence of point-vortex-like dynamics on the acceleration. A causal connection is found between the shape of the probability density function and the autocorrelation of the norm of the acceleration. |
|
|
|
|
|
|
|
|
|
|
|
| 1: | Modélisation et Simulation Numérique en Mécanique et Génie des Procédés (MSNMGP) |
|
|
|
CNRS : UMR6181 – Université de la Méditerranée - Aix-Marseille II – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III |
|
|
| 2: | Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA) |
|
|
|
CNRS : UMR5509 – Université Claude Bernard - Lyon I – Ecole Centrale de Lyon – Institut National des Sciences Appliquées (INSA) - Lyon |
|
|
|
|
|
|
|
|
|
| Subject | : | Physics/Mechanics/Mechanics of the fluids Engineering Sciences/Mechanics/Fluids mechanics Physics/Physics/Plasma Physics |
|
|
| Attached file list to this document: | ||||||||||
|
||||||||||
|
|
|
| hal-00521759, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00521759 | |
| oai:hal.archives-ouvertes.fr:hal-00521759 | |
| From: Wouter Bos | |
| Submitted on: Tuesday, 28 September 2010 15:03:57 | |
| Updated on: Tuesday, 28 September 2010 18:09:42 | |
