Turbulence Scale Dependence of the Richardson Constant in Lagrangian Stochastic Models |
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| Authors: | A Maurizi G Pagnini F Tampieri |
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| Institution: | (1) ISAC-CNR, via Gobetti 101, I-40129 Bologna, Italy;(2) Facoltà di Scienze Ambientali, Università di Urbino, Campus Scientifico Sogesta, I-61029 Urbino, Italy |
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| Abstract: | We 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* = 2gC0− 1, where g is the Richardson constant. |
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| Keywords: | Eulerian turbulence scale Lagrangian stochastic models Lagrangian turbulence scale Relative dispersion Richardson coefficient |
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