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How tracer particles sample the complexity of turbulence

Title data

Lalescu, Cristian ; Wilczek, Michael:
How tracer particles sample the complexity of turbulence.
In: New Journal of Physics. Vol. 20 (2018) . - No. 013001.
ISSN 1367-2630
DOI: https://doi.org/10.1088/1367-2630/aa8ecd

Abstract in another language

On their roller coaster ride through turbulence, tracer particles sample the fluctuations of the underlying fields in space and time. Quantitatively relating particle and field statistics remains a fundamental challenge in a large variety of turbulent flows. Wequantify how tracer particles sample turbulence by expressing their temporal velocity fluctuations in terms of an effective probabilistic sampling of spatial velocity field fluctuations. To corroborate our theory, we investigate an extensive suite of direct numerical simulations of hydrodynamic turbulence covering a Taylor-scale Reynolds number range from 150 to 430. Our approach allows the assessment of particle statistics from the knowledge of flow field statistics only, therefore opening avenues to a new generation of models for transport in complex flows.

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: 18 Feb 2022 11:17
Last Modified: 18 Feb 2022 11:44
URI: https://eref.uni-bayreuth.de/id/eprint/67598