Fluctuation-Dissipation Relations and statistical temperatures in a turbulent von Kármán flow

Details Fluctuation-Dissipation Relations and statistical temperatures in a turbulent von Kármán flow Fluctuation-Dissipation Relations and statistical temperatures in a turbulent von Kármán flow

2008-02-06

arxiv.org/abs/0802.0807v2

Phys.Rev.Lett.101:174502,2008

Physics

Fluid Dynamics

four pages 2 figures one table

Scientific paper

10.1103/PhysRevLett.101.174502

We experimentally characterize the fluctuations of the non-homogeneous non-isotropic turbulence in an axisymmetric von K\'arm\'an flow. We show that these fluctuations satisfy relations analogous to classical Fluctuation-Dissipation Relations (FDRs) in statistical mechanics. We use these relations to measure statistical temperatures of turbulence. The values of these temperatures are found to be dependent on the considered observable as already evidenced in other far from equilibrium systems.

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