dorsal/arxiv
View SchemaRichardson's pair diffusion and the stagnation point structure of turbulence
| Authors | Javier Davila, Christos Vassilicos |
|---|---|
| Categories | |
| ArXiv ID | physics/0207108 |
| URL | https://arxiv.org/abs/physics/0207108 |
| DOI | 10.1103/PhysRevLett.91.144501 |
Abstract
DNS and laboratory experiments show that the spatial distribution of straining stagnation points in homogeneous isotropic 3D turbulence has a fractal structure with dimension D_s = 2. In Kinematic Simulations the time exponent gamma in Richardson's law and the fractal dimension D_s are related by gamma = 6/D_s. The Richardson constant is found to be an increasing function of the number of straining stagnation points in agreement with pair duffusion occuring in bursts when pairs meet such points in the flow.
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"abstract": "DNS and laboratory experiments show that the spatial distribution of\nstraining stagnation points in homogeneous isotropic 3D turbulence has a\nfractal structure with dimension D_s = 2. In Kinematic Simulations the time\nexponent gamma in Richardson\u0027s law and the fractal dimension D_s are related by\ngamma = 6/D_s. The Richardson constant is found to be an increasing function of\nthe number of straining stagnation points in agreement with pair duffusion\noccuring in bursts when pairs meet such points in the flow.",
"arxiv_id": "physics/0207108",
"authors": [
"Javier Davila",
"Christos Vassilicos"
],
"categories": [
"physics.flu-dyn",
"physics.ao-ph"
],
"doi": "10.1103/PhysRevLett.91.144501",
"title": "Richardson\u0027s pair diffusion and the stagnation point structure of turbulence",
"url": "https://arxiv.org/abs/physics/0207108"
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