Large Kinematic Dynamo and Intermittence in a Turbulent Flow

نویسنده

  • B. L. Rozovskii
چکیده

The large time asymptotics of a magnetic eld in a turbulent -correlated (in time) ow of an ideal incompressible uid are studied. It is shown that the magnetic eld exhibits the dynamo e ect (exponential stretching) unless the Lagrangian ow generated by the velocity eld is (almost surely) distance preserving; and it is intermittent unless the Lagrangian ow associated to the turbulent component of the velocity is (almost surely) distance preserving.

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تاریخ انتشار 1994