Turbulence with a spectral gap

Details Turbulence with a spectral gap Turbulence with a spectral gap

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phfl...26..877p&link_type=abstract

Physics of Fluids (ISSN 0031-9171), vol. 26, April 1983, p. 877-880.

Physics

Condensed Matter

Statistical Mechanics

13

Energy Spectra, Magnetohydrodynamic Flow, Plasma Dynamics, Plasma Spectra, Plasma Turbulence, Astrophysics, Equilibrium Equations, Geophysics, Space Plasmas, Statistical Mechanics, Turbulent Flow

Scientific paper

An analytical investigation of the contiguous existence of two turbulent flows separated by a spectral gap is presented. The instabilities are considered to occur on widely disparate scales. A Kolmogorov (1941) description of the basic processes is developed for full scale turbulence, and statistical closure theory is used to model the flow phenomena. It is shown that the equilibrium conditions of the small flow are not sufficient to eliminate large-scale turbulence in the larger flow, and large scale shear feeds small scale turbulence only as a second-order effect. Applications of the analysis to astrophysical and geophysical conditions are indicated.

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