Single particle Lagrangian dispersion in Bolgiano turbulence
| dc.creator | Bistagnino, A. | |
| dc.creator | Boffetta, G. | |
| dc.creator | Mazzino, A. | |
| dc.date | 2006-10-25 | |
| dc.date.accessioned | 2026-07-07T08:49:47Z | |
| dc.date.available | 2026-07-07T08:49:47Z | |
| dc.description | Single-particle dispersion in the Bolgiano--Obukhov regime of two-dimensional turbulent convection is investigated. Unlike dispersion in a flow displaying the classical K41 phenomenology, here, the leading contribution to the Lagrangian velocity fluctuations is given by the largest eddies. This implies a linear behavior in time for a typical velocity fluctuation in the time interval $t$. The contribution to the Lagrangian velocity fluctuations of local eddies (i.e. with a characteristic time of order $t$), whose space/time scalings are ruled by the Bolgiano--Obukhov theory, is thus not detectable by standard Lagrangian statistical observables. To disentangle contributions arising from the large eddies from those of local eddies, a strategy based on exit-time statistics has successfully been exploited. Lagrangian velocity increments in Bolgiano convection thus provide a physically relevant example of signal with \emph{more than smooth} fluctuations. | |
| dc.description | 4 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/nlin/0610060 | |
| dc.identifier | http://arxiv.org/abs/nlin/0610060 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/144428 | |
| dc.subject | Chaotic Dynamics | |
| dc.subject | Fluid Dynamics | |
| dc.title | Single particle Lagrangian dispersion in Bolgiano turbulence | |
| dc.type | text |