Lagrangian investigation of two-dimensional decaying turbulence

Wilczek, Michael; Kamps, Oliver; Friedrich, Rudolf

doi:10.1016/j.physd.2008.01.013

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Lagrangian investigation of two-dimensional decaying turbulence

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Wilczek, Michael
Max Planck Research Group Theory of Turbulent Flows, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Wilczek, M., Kamps, O., & Friedrich, R. (2008). Lagrangian investigation of two-dimensional decaying turbulence. Physica D: Nonlinear Phenomena, 237(14-17), 2090-2094. doi:10.1016/j.physd.2008.01.013.

Cite as: https://hdl.handle.net/21.11116/0000-0003-E077-A

Abstract

We present a numerical investigation of two-dimensional decaying
turbulence in the Lagrangian framework. Focusing on single particle
statistics, we investigate Lagrangian trajectories in a freely evolving
turbulent velocity field. The dynamical evolution of the tracer
particles is strongly dominated by the emergence and evolution of
coherent structures. For a statistical analysis we focus on the
Lagrangian acceleration as a central quantity. For more geometrical
aspects we investigate the curvature along the trajectories. We find
strong signatures for the self-similar universal behavior. (c) 2008
Elsevier B.V. All rights reserved.