dorsal/arxiv
View SchemaThe dependence of relative dispersion on turbulence scales in Lagrangian Stochastic Models
| Authors | A. Maurizi, G. Pagnini, F. Tampieri |
|---|---|
| Categories | |
| ArXiv ID | physics/0310103 |
| URL | https://arxiv.org/abs/physics/0310103 |
Abstract
The aim of the article is to investigate the relative dispersion properties of the Well Mixed class of Lagrangian Stochastic Models. Dimensional analysis shows that given a model in the class, its properties depend solely on a non-dimensional parameter, which measures the relative weight of Lagrangian-to-Eulerian scales. This parameter is formulated in terms of Kolmogorov constants, and model properties are then studied by modifying its value in a range that contains the experimental variability. Large variations are found for the quantity $g^*=2gC_0^{-1}$, where $g$ is the Richardson constant, and for the duration of the $t^3$ regime. Asymptotic analysis of model behaviour clarifies some inconsistencies in the literature and excludes the Ornstein-Uhlenbeck process from being considered a reliable model for relative dispersion.
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"abstract": "The aim of the article is to investigate the relative dispersion properties\nof the Well Mixed class of Lagrangian Stochastic Models. Dimensional analysis\nshows that given a model in the class, its properties depend solely on a\nnon-dimensional parameter, which measures the relative weight of\nLagrangian-to-Eulerian scales. This parameter is formulated in terms of\nKolmogorov constants, and model properties are then studied by modifying its\nvalue in a range that contains the experimental variability. Large variations\nare found for the quantity $g^*=2gC_0^{-1}$, where $g$ is the Richardson\nconstant, and for the duration of the $t^3$ regime. Asymptotic analysis of\nmodel behaviour clarifies some inconsistencies in the literature and excludes\nthe Ornstein-Uhlenbeck process from being considered a reliable model for\nrelative dispersion.",
"arxiv_id": "physics/0310103",
"authors": [
"A. Maurizi",
"G. Pagnini",
"F. Tampieri"
],
"categories": [
"physics.ao-ph"
],
"title": "The dependence of relative dispersion on turbulence scales in Lagrangian Stochastic Models",
"url": "https://arxiv.org/abs/physics/0310103"
},
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