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Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
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Odd Viscosity Suppresses Intermittency in Direct Turbulent Cascades
Sihan Chen1,2, Xander M de Wit3, Michel Fruchart4
1Kadanoff Center for Theoretical Physics, <a href="https://ror.org/024mw5h28">The University of Chicago</a>, Chicago, Illinois 60637, USA.
Physical Review Letters
|October 18, 2024
Summary
Odd viscosity suppresses intermittency in turbulent flows by inducing parity-breaking waves. This allows for the design of turbulent flows with tunable self-similarity and reduced anomalous scaling.
Area of Science:
- Fluid dynamics
- Turbulence theory
- Non-equilibrium statistical mechanics
Background:
- Intermittency in turbulent flows arises from anomalous spatiotemporal fluctuations, disrupting self-similarity.
- Odd viscosity, a property of parity-breaking fluids, is present in systems like magnetized gases and electron fluids.
Purpose of the Study:
- To investigate the effect of odd viscosity on intermittency in turbulent flows.
- To understand the underlying mechanisms by which odd viscosity influences turbulent scaling.
Main Methods:
- Navier-Stokes simulations
- Theoretical analysis
- Development of a two-channel helical shell model
Main Results:
- Odd viscosity suppresses intermittency at small scales.
- Parity-breaking waves induced by odd viscosity disrupt scale invariances.
- Anomalous scaling in turbulent flows is suppressed.
Conclusions:
- Odd viscosity offers a mechanism to control intermittency in turbulent flows.
- A tunable length scale emerges, below which self-similar turbulence develops.
- Potential for designing turbulent flows with adjustable intermittency levels.
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