We study a simple magnetohydrodynamical approach in which hydrodynamics and MHD turbulence are coupled in a shell model, with given dynamo constraints in the large scales. We consider the case of a low Prandtl number fluid for which the inertial range of the velocity field is much wider than that of the magnetic field. Random reversals of the magnetic field are observed and it shown that the magnetic field has a nontrivial evolution—linked to the nature of the hydrodynamics turbulence.
Benzi, R., Pinton, J. (2010). Magnetic Reversals in a Simple Model of Magnetohydrodynamics. PHYSICAL REVIEW LETTERS, 105(2), 024501-024504 [10.1103/PhysRevLett.105.024501].
Magnetic Reversals in a Simple Model of Magnetohydrodynamics
BENZI, ROBERTO;
2010-07-01
Abstract
We study a simple magnetohydrodynamical approach in which hydrodynamics and MHD turbulence are coupled in a shell model, with given dynamo constraints in the large scales. We consider the case of a low Prandtl number fluid for which the inertial range of the velocity field is much wider than that of the magnetic field. Random reversals of the magnetic field are observed and it shown that the magnetic field has a nontrivial evolution—linked to the nature of the hydrodynamics turbulence.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
