Twodimensional turbulence and external effects
Abstract
Two dimensional turbulence is analyzed using the approximation of 'external friction'. The effect of time extension is demonstrated whereby velocity field fluctuations become progressively lowfrequency. The conditions of stability of twodimensional turbulence with respect to threedimensional perturbations and the stabilizing role of a magnetic field are examined. An analysis is then made of the powerlaw and exponential attenuation of velocity field fluctuations in turbulent flows behind a grating, both with and without a magnetic field.
 Publication:

Magnitnaia Gidrodinamika
 Pub Date:
 June 1986
 Bibcode:
 1986MagGi....R...3B
 Keywords:

 Flow Stability;
 Turbulent Flow;
 Two Dimensional Flow;
 Differential Equations;
 Flow Equations;
 Flow Velocity;
 Friction Factor;
 Grids;
 Perturbation Theory;
 Fluid Mechanics and Heat Transfer