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Long time memory of Lagrangian acceleration statistics in 2D and 3D turbulence

Title data

Kamps, Oliver ; Wilczek, Michael:
Long time memory of Lagrangian acceleration statistics in 2D and 3D turbulence.
In: Journal of Physics: Conference Series. Vol. 318 (2011) . - No. 052033.
ISSN 1742-6596
DOI: https://doi.org/10.1088/1742-6596/318/5/052033

Abstract in another language

In this paper we report on a comparison of Lagrangian acceleration statistics in the direct energy cascade of three-dimensional turbulence and the corresponding observables for the case of the inverse energy cascade in two dimensions. We focus on the time scales describing the memory of the acceleration statistics of a tracer particle. We show that for both systems the Markov time scale, which is an indicator for the length of the memory of a stochastic process, is in the order of magnitude of the Lagrangian integral time scale. We also show that the decorrelation time for the cross-correlation between the squared components of the acceleration is larger than the integral time scale.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Themenheft: Particles in turbulence, transport processes and mixing
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics I > Chair Theoretical Physics I - Univ.-Prof. Dr. Michael Wilczek
Profile Fields > Advanced Fields > Nonlinear Dynamics
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Feb 2022 10:52
Last Modified: 23 Feb 2022 10:52
URI: https://eref.uni-bayreuth.de/id/eprint/67579