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Particle dispersion in synthetic turbulent flows
Reigada Sanz, Ramon; Martí Pérez, Arturo C.; Sokolov, Igor M., 1958-; Sagués i Mestre, Francesc; Sancho, José M.
Universitat de Barcelona
We study particle dispersion advected by a synthetic turbulent flow from a Lagrangian perspective and focus on the two-particle and cluster dispersion by the flow. It has been recently reported that Richardson¿s law for the two-particle dispersion can stem from different dispersion mechanisms, and can be dominated by either diffusive or ballistic events. The nature of the Richardson dispersion depends on the parameters of our flow and is discussed in terms of the values of a persistence parameter expressing the relative importance of the two above-mentioned mechanisms. We support this analysis by studying the distribution of interparticle distances, the relative velocity correlation functions, as well as the relative trajectories.
26-07-2011
Física estadística
Termodinàmica
Sistemes dinàmics diferenciables
Dinàmica de fluids
Statistical physics
Thermodynamics
Differentiable dynamical systems
Fluid dynamics
(c) The American Physical Society, 2000
Artículo
The American Physical Society
         

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