Towards a Simple Model of Compressible Alfvenic Turbulence

Details Towards a Simple Model of Compressible Alfvenic Turbulence Towards a Simple Model of Compressible Alfvenic Turbulence

1996-12-08

arxiv.org/abs/physics/9612005v2

Phys. Rev. E 56, R2371-R2374 (1997)

Physics

Plasma Physics

6 pages, one figure, REVTeX; this version to be published in PRE. For related papers, see http://sdphpd.ucsd.edu/~medvedev/pap

Scientific paper

10.1103/PhysRevE.56.R2371

A simple model collisionless, dissipative, compressible MHD (Alfvenic) turbulence in a magnetized system is investigated. In contrast to more familiar paradigms of turbulence, dissipation arises from Landau damping, enters via nonlinearity, and is distributed over all scales. The theory predicts that two different regimes or phases of turbulence are possible, depending on the ratio of steepening to damping coefficient (m_1/m_2). For strong damping (|m_1/m_2|<1), a regime of smooth, hydrodynamic turbulence is predicted. For |m_1/m_2|>1, steady state turbulence does not exist in the hydrodynamic limit. Rather, spikey, small scale structure is predicted.

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