dorsal/arxiv
View SchemaClustering of Aerosols in Atmospheric Turbulent Flow
| Authors | T. Elperin, N. Kleeorin, M. A. Liberman, V. L'vov, I. Rogachevskii |
|---|---|
| Categories | |
| ArXiv ID | physics/0702125 |
| URL | https://arxiv.org/abs/physics/0702125 |
| Journal | Environmental Fluid Mechanics 7 (2007) 173--193 |
Abstract
A mechanism of formation of small-scale inhomogeneities in spatial distributions of aerosols and droplets associated with clustering instability in the atmospheric turbulent flow is discussed. The particle clustering is a consequence of a spontaneous breakdown of their homogeneous space distribution due to the clustering instability, and is caused by a combined effect of the particle inertia and a finite correlation time of the turbulent velocity field. In this paper a theoretical approach proposed in Phys. Rev. E 66, 036302 (2002) is further developed and applied to investigate the mechanisms of formation of small-scale aerosol inhomogeneities in the atmospheric turbulent flow. The theory of the particle clustering instability is extended to the case when the particle Stokes time is larger than the Kolmogorov time scale, but is much smaller than the correlation time at the integral scale of turbulence. We determined the criterion of the clustering instability for the Stokes number larger than 1. We discussed applications of the analyzed effects to the dynamics of aerosols and droplets in the atmospheric turbulent flow.
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"abstract": "A mechanism of formation of small-scale inhomogeneities in spatial\ndistributions of aerosols and droplets associated with clustering instability\nin the atmospheric turbulent flow is discussed. The particle clustering is a\nconsequence of a spontaneous breakdown of their homogeneous space distribution\ndue to the clustering instability, and is caused by a combined effect of the\nparticle inertia and a finite correlation time of the turbulent velocity field.\nIn this paper a theoretical approach proposed in Phys. Rev. E 66, 036302 (2002)\nis further developed and applied to investigate the mechanisms of formation of\nsmall-scale aerosol inhomogeneities in the atmospheric turbulent flow. The\ntheory of the particle clustering instability is extended to the case when the\nparticle Stokes time is larger than the Kolmogorov time scale, but is much\nsmaller than the correlation time at the integral scale of turbulence. We\ndetermined the criterion of the clustering instability for the Stokes number\nlarger than 1. We discussed applications of the analyzed effects to the\ndynamics of aerosols and droplets in the atmospheric turbulent flow.",
"arxiv_id": "physics/0702125",
"authors": [
"T. Elperin",
"N. Kleeorin",
"M. A. Liberman",
"V. L\u0027vov",
"I. Rogachevskii"
],
"categories": [
"physics.ao-ph",
"nlin.CD",
"physics.flu-dyn"
],
"journal_ref": "Environmental Fluid Mechanics 7 (2007) 173--193",
"title": "Clustering of Aerosols in Atmospheric Turbulent Flow",
"url": "https://arxiv.org/abs/physics/0702125"
},
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