Extreme events for two-particles separations in turbulent flows

Autor:	Biferale, L., Lanotte, A.S., Scatamacchia, R., Toschi, F., Talamelli, A., Oberlack, M., Peinke, J.
Přispěvatelé:	Fluids and Flows, Scientific Computing, Toschi Group
Jazyk:	angličtina
Rok vydání:	2014
Předmět:	Physics symbols.namesake Distribution (number theory) Turbulence Isotropy Direct numerical simulation Extreme events symbols Probability density function Mechanics Lyapunov exponent Event (particle physics)
Zdroj:	Progress in Turbulence V (Proceedings of the iTi Conference in Turbulence 2012), 19-22 October 2012, Beryinoro, Italy, 9-16 STARTPAGE=9;ENDPAGE=16;TITLE=Progress in Turbulence V (Proceedings of the iTi Conference in Turbulence 2012), 19-22 October 2012, Beryinoro, Italy Progress in Turbulence V ISBN: 9783319018591
ISSN:	0930-8989
Popis:	Results from high resolution numerical simulations of tracer particles emitted from localised sources in homogeneous and isotropic flows are presented. A huge number of tracers are emitted in order to reach an unprecedented statistics concerning particles pairs motion. We show that the far tails of the particles pair separation Probability Distribution Function can not be described by a Richardsonlike distribution, even if finite Reynolds effects are introduced. We argue that to describe extreme event statistics, velocity temporal correlations and non-Gaussian fluctuations must be taken into account.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f52645d4564eff309e5c7afe69f92d0c https://doi.org/10.1007/978-3-319-01860-7_2 Zobrazit plný text záznamu