dorsal/arxiv
View SchemaThe 3D structure of the Lagrangian acceleration in turbulent flows
| Authors | Nicolas Mordant, Alice M. Crawford, Eberhard Bodenschatz |
|---|---|
| Categories | |
| ArXiv ID | physics/0410070 |
| URL | https://arxiv.org/abs/physics/0410070 |
| DOI | 10.1103/PhysRevLett.93.214501 |
Abstract
We report experimental results on the three dimensional Lagrangian acceleration in highly turbulent flows. Tracer particles are tracked optically using four silicon strip detectors from high energy physics that provide high temporal and spatial resolution. The components of the acceleration are shown to be statistically dependent. The probability density function (PDF) of the acceleration magnitude is comparable to a log-normal distribution. Assuming isotropy, a log-normal distribution of the magnitude can account for the observed dependency of the components. The time dynamics of the acceleration components is found to be typical of the dissipation scales whereas the magnitude evolves over longer times, possibly close to the integral time scale.
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"abstract": "We report experimental results on the three dimensional Lagrangian\nacceleration in highly turbulent flows. Tracer particles are tracked optically\nusing four silicon strip detectors from high energy physics that provide high\ntemporal and spatial resolution. The components of the acceleration are shown\nto be statistically dependent. The probability density function (PDF) of the\nacceleration magnitude is comparable to a log-normal distribution. Assuming\nisotropy, a log-normal distribution of the magnitude can account for the\nobserved dependency of the components. The time dynamics of the acceleration\ncomponents is found to be typical of the dissipation scales whereas the\nmagnitude evolves over longer times, possibly close to the integral time scale.",
"arxiv_id": "physics/0410070",
"authors": [
"Nicolas Mordant",
"Alice M. Crawford",
"Eberhard Bodenschatz"
],
"categories": [
"physics.flu-dyn"
],
"doi": "10.1103/PhysRevLett.93.214501",
"title": "The 3D structure of the Lagrangian acceleration in turbulent flows",
"url": "https://arxiv.org/abs/physics/0410070"
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