Transport in two-fluid magnetohydrodynamic turbulence
- Department of Applied Mathematics, University of Sheffield, Sheffield, S3 7RH (United Kingdom)
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 B{sub 0} found in single fluid MHD turbulence, leading to turbulent magnetic diffusivity {eta}{sub T}{proportional_to}({eta}/{omega}){sup 1/3}B{sub 0}{sup -2}. Here, {eta} and {omega} 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.
- OSTI ID:
- 21076230
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 76, Issue 2; Other Information: DOI: 10.1103/PhysRevE.76.025401; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-651X
- Country of Publication:
- United States
- Language:
- English
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