Transport in two-fluid magnetohydrodynamic turbulence

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Abstract

We present a theory of transport of magnetic flux and momentum in two fluid three-dimensional reduced magnetohydrodynamic (MHD) turbulence. By including the effects of shear flows and magnetic fields consistently, we show that kinetic Alfven waves can help weaken the quenching in turbulent transport of a strong magnetic field B0 found in single fluid MHD turbulence, leading to turbulent magnetic diffusivity ηT ∝(η/Ω)1/3 B0 -2. Here, η and Ω are the Ohmic diffusivity and the shearing rate of the shear flow. Momentum transport is diffusive, with the value of eddy viscosity larger than that in single fluid MHD turbulence. The effects of drift waves are found to be weaker. Implications for the instability of shear flows are discussed.

Original languageEnglish
Article number025401
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume76
Issue number2
DOIs
Publication statusPublished - 28 Aug 2007
Externally publishedYes

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ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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