Decaying magnetohydrodynamics: effects of initial conditions

Details Decaying magnetohydrodynamics: effects of initial conditions Decaying magnetohydrodynamics: effects of initial conditions

1999-10-11

arxiv.org/abs/chao-dyn/9910017v1

Physics

Condensed Matter

To appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.61.1407

We study the effects of homogenous and isotropic initial conditions on decaying Magnetohydrodynamics (MHD). We show that for an initial distribution of velocity and magnetic field fluctuations, appropriately defined structure functions decay as power law in time. We also show that for a suitable choice of initial cross-correlations between velocity and magnetic fields even order structure functions acquire anomalous scaling in time where as scaling exponents of the odd order structure functions remain unchanged. We discuss our results in the context of fully developed MHD turbulence.

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