Invariants, symmetries and scaling of Rayleigh-Taylor turbulent mixing

Details Invariants, symmetries and scaling of Rayleigh-Taylor turbulent mixing Invariants, symmetries and scaling of Rayleigh-Taylor turbulent mixing

2010-04-26

arxiv.org/abs/1004.4670v1

Physics

Plasma Physics

Scientific paper

We extend the ideas of Kolmogorov theory on symmetries of turbulent dynamics to analyze invariants, scaling and spectra of unsteady turbulent mixing induced by the Rayleigh-Taylor instability. Time- and scale-invariance of the rate of momentum loss leads to non-dissipative momentum transfer between the scales, to and power-law scale-dependencies of the velocity and Reynolds number and spectra distinct from Kolmogorov, and sets the viscous and dissipation scales. Turbulent mixing exhibits more order compared to isotropic turbulence. Mechanisms of flow regularization are discussed.

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