2003/10/21 by A. Maurizi, Maurizi, A., G. Pagnini +3
Physics and Astronomy · #Atmospheric and Oceanic Physics (physics.ao-ph) #FOS: Physical sciences #physics.ao-ph
paper · pdf · doi:10.48550/arxiv.physics/0310103
15 pages, 10 figures, LaTeX source
arxiv created 2003/10/21 · arxiv updated 2009/12/01
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^*=2gC0-1, where g is the Richardson constant, and for the duration of the t3 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.