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Vortex dynamics and Lagrangian statistics in a model for active turbulence

Title data

James, Martin ; Wilczek, Michael:
Vortex dynamics and Lagrangian statistics in a model for active turbulence.
In: The European Physical Journal E. Vol. 41 (2018) Issue 2 . - No. 21.
ISSN 1292-895X
DOI: https://doi.org/10.1140/epje/i2018-11625-8

Abstract in another language

Cellular suspensions such as dense bacterial flows exhibit a turbulence-like phase under certain conditions. We study this phenomenon of "active turbulence" statistically by using numerical tools. Following Wensink et al. (Proc. Natl. Acad. Sci. U.S.A. 109, 14308 (2012)), we model active turbulence by means of a generalized Navier-Stokes equation. Two-point velocity statistics of active turbulence, both in the Eulerian and the Lagrangian frame, is explored. We characterize the scale-dependent features of two-point statistics in this system. Furthermore, we extend this statistical study with measurements of vortex dynamics in this system. Our observations suggest that the large-scale statistics of active turbulence is close to Gaussian with sub-Gaussian tails.

Further data

Item Type: Article in a journal
Refereed: Yes
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 08:54
Last Modified: 23 Feb 2022 08:54
URI: https://eref.uni-bayreuth.de/id/eprint/67569