Ion heat and parallel momentum transport by stochastic magnetic fields and turbulence

Transport of parallel momentum by drift-Alfvén turbulence

An electromagnetic gyrokinetic formulation is utilized to calculate the turbulent radial flux of parallel momentum for a strongly magnetized plasma in the large aspect ratio limit. For low-! plasmas, excluding regions of steep density gradients, the level of momentum transport induced by microturbulence is found to be well described within the electrostatic approximation. However, near regions ...

Transport of parallel momentum by collisionless drift wave turbulence

This paper presents a novel, unified approach to the theory of turbulent transport of parallel momentum by collisionless drift waves. The physics of resonant and nonresonant off-diagonal contributions to the momentum flux is emphasized, and collisionless momentum exchange between waves and particles is accounted for. Two related momentum conservation theorems are derived. These relate the reson...

Nonlinear parallel momentum transport in strong electrostatic turbulence

TURBULENCE AND MAGNETIC FIELDS IN CLOUDS Discussion

We discuss several categories of models which may explain the IMF, including the possible role of turbulence and magnetic fields.

Turbulence and Magnetic Fields in Astrophysical Plasmas

Magnetic fields permeate the Universe. They are found in planets, stars, accretion discs, galaxies, clusters of galaxies, and the intergalactic medium. While there is often a component of the field that is spatially coherent at the scale of the astrophysical object, the field lines are tangled chaotically and there are magnetic fluctuations at scales that range over orders of magnitude. The cau...