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- Devranjan Samanta
- Max Planck Institute for Dynamics and Self-Organization, 37073 Göttingen, Germany;
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- Yves Dubief
- School of Engineering, University of Vermont, Burlington, VT 05405;
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- Markus Holzner
- Max Planck Institute for Dynamics and Self-Organization, 37073 Göttingen, Germany;
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- Christof Schäfer
- Experimental Physics, Saarland University, 66041 Saarbrücken, Germany;
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- Alexander N. Morozov
- Scottish Universities Physics Alliance, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom; and
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- Christian Wagner
- Experimental Physics, Saarland University, 66041 Saarbrücken, Germany;
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- Björn Hof
- Max Planck Institute for Dynamics and Self-Organization, 37073 Göttingen, Germany;
説明
<jats:p>Turbulence is ubiquitous in nature, yet even for the case of ordinary Newtonian fluids like water, our understanding of this phenomenon is limited. Many liquids of practical importance are more complicated (e.g., blood, polymer melts, paints), however; they exhibit elastic as well as viscous characteristics, and the relation between stress and strain is nonlinear. We demonstrate here for a model system of such complex fluids that at high shear rates, turbulence is not simply modified as previously believed but is suppressed and replaced by a different type of disordered motion, elasto-inertial turbulence. Elasto-inertial turbulence is found to occur at much lower Reynolds numbers than Newtonian turbulence, and the dynamical properties differ significantly. The friction scaling observed coincides with the so-called “maximum drag reduction” asymptote, which is exhibited by a wide range of viscoelastic fluids.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 110 (26), 10557-10562, 2013-06-11
Proceedings of the National Academy of Sciences