Imaging of Intermittency in Ripple-Wave Turbulence

The dynamics of a fluid surface filled with high-amplitude ripples were studied with a technique (diffusing light photography) that resolves the height at all locations instantaneously. Even when nonlinearities are strong enough to generate a (Kolmogorov) cascade from long wavelength (where energy i...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1997-11, Vol.278 (5343), p.1609-1612
Main Authors: Wright, William B., Budakian, R., Pine, D. J., Putterman, S. J.
Format: Article
Language:English
Subjects:
Amplitude
Boundary layer and shear turbulence
Capillary waves
Energy
Exact sciences and technology
Flow (Dynamics)
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Hydrodynamic waves
Instrumentation for fluid dynamics
Kinetics
Laser beams
Light
Measurement
Physics
Pixels
Thermodynamic equilibrium
Turbulence
Turbulence (Fluid dynamics)
Turbulent flows, convection, and heat transfer
Viscosity
Wall-bounded thin shear flows
Water
Wavelengths
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Summary:The dynamics of a fluid surface filled with high-amplitude ripples were studied with a technique (diffusing light photography) that resolves the height at all locations instantaneously. Even when nonlinearities are strong enough to generate a (Kolmogorov) cascade from long wavelength (where energy is input) to shorter wavelength, the resulting turbulent state contains large coherent spatial structures. The appearance of these structures in a thermal equilibrium state (with the same average energy) would be highly improbable.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.278.5343.1609