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Turbulent flow of a fluid with anisotropic viscosity

Published online by Cambridge University Press:  01 March 2016

Tim Grünberg  and
Thomas Rösgen
Tim Grünberg
Affiliation:
Institute of Fluid Dynamics, ETH Zürich, 8092 Zürich, Switzerland
Thomas Rösgen*
Affiliation:
Institute of Fluid Dynamics, ETH Zürich, 8092 Zürich, Switzerland
*
†Email address for correspondence: roesgen@ifd.mavt.ethz.ch
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Abstract

We ask if and how the large-scale structure of a turbulent flow depends on anisotropies introduced at the smallest scales. We generate such anisotropy on the viscous scale in a paramagnetic colloid whose rheology is modified by an external, uniform magnetic field. We report measurements in a high Reynolds number turbulence experiment ($R_{{\it\lambda}}=120$). Ultrasound velocimetry provides records of tracer particle velocity. Distinct changes in the velocity statistics can be observed from the dissipative scales up to the mean flow topology.

JFM classification

MHD and Electrohydrodynamics: Magnetic fluids MHD and Electrohydrodynamics: MHD and Electrohydrodynamics Turbulent Flows: Turbulent Flows
Type
Papers
Information
Journal of Fluid Mechanics , Volume 792 , 10 April 2016 , pp. 252 - 273
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Copyright
© 2016 Cambridge University Press 

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