Lagrangian particle tracking in high Reynolds number turbulence

Autor:	Eberhard Bodenschatz, Haitao Xu, Nicholas T. Ouellette, Kelken Chang
Rok vydání:	2007
Předmět:	Physics::Fluid Dynamics Physics symbols.namesake Turbulence Reynolds decomposition K-epsilon turbulence model symbols Reynolds number Reynolds stress equation model Mechanics Lagrangian particle tracking Reynolds-averaged Navier–Stokes equations Taylor microscale
Zdroj:	ERCOFTAC Series ISBN: 9781402062179 ResearcherID
Popis:	We describe a Lagrangian particle tracking technique that can be applied to high Reynolds number turbulent flows. This technique produces three-dimensional Lagrangian trajectories of multiple particles, from which both Lagrangian and Eulerian statistics can be obtained. We illustrate the application of this technique with measurements performed in a von Ka rman swirling flow generated in a vertical cylindrical tank between two counter-rotating baffled disks. The Taylor microscale Reynolds number investigated runs from 200 to 815. The Kolmogorov time scale of the flow was resolved and both the turbulent velocity and acceleration were obtained and their probability density functions measured. Measurements of the Eulerian and Lagrangian velocity structure functions are presented. The average energy dissipation rates are determined from the Eulerian velocity structure functions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffbd2408df7a527c8c9b5c8696283422 https://doi.org/10.1007/978-1-4020-6218-6_24 Zobrazit plný text záznamu