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Particle dispersion in two-dimensional turbulence: a comparison with 2-D kinematic simulation
Castilla López, Roberto; Redondo Apraiz, José Manuel; Gámez Montero, Pedro Javier; Babiano, Armando
Universitat Politècnica de Catalunya. Departament de Mecànica de Fluids; Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
We study numerically the comparison between Lagrangian experiments on turbulent particle dispersion in 2-D turbulent flows performed, on the one hand, on the basis of direct numerical simulations (DNS) and, on the other hand, using kinematic simulations (KS). Eulerian space-time structure of both DNS and KS dynamics are not comparable, mostly due to the absence of strong coherent vortices and advection processes in the KS fields. The comparison allows to refine past studies about the contribution of nonhomogeneous space-time 2-D Eulerian structure on the turbulent absolute and relative particle dispersion processes. We particularly focus our discussion on the Richardson’s regime for relative dispersion.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Particles
Simulation methods
Partícules (Matèria)
Simulació, Mètodes de
Dispersió (Física)
Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/publishedVersion
Article
University of Thechnology and Agriculture Nicholas Copernicus University
         

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