Physics – Fluid Dynamics
Scientific paper
2010-06-09
Physics
Fluid Dynamics
Posted with permission from the Annual Review of Fluid Mechanics, Volume 43 (c) 2011 by Annual Reviews, http://www.annualrevie
Scientific paper
This article reviews recent studies of scale interactions in magnetohydrodynamic turbulence. The present day increase of computing power, which allows for the exploration of different configurations of turbulence in conducting flows, and the development of shell-to-shell transfer functions, has led to detailed studies of interactions between the velocity and the magnetic field and between scales. In particular, processes such as induction and dynamo action, the damping of velocity fluctuations by the Lorentz force, or the development of anisotropies, can be characterized at different scales. In this context we consider three different configurations often studied in the literature: mechanically forced turbulence, freely decaying turbulence, and turbulence in the presence of a uniform magnetic field. Each configuration is of interest for different geophysical and astrophysical applications. Local and non-local transfers are discussed for each case. While the transfer between scales of solely kinetic or solely magnetic energy is local, transfers between kinetic and magnetic fields are observed to be local or non-local depending on the configuration. Scale interactions in the cascade of magnetic helicity are also reviewed. Based on the results, the validity of several usual assumptions in hydrodynamic turbulence, such as isotropy of the small scales or universality, is discussed.
Mininni Pablo Daniel
No associations
LandOfFree
Scale interactions in magnetohydrodynamic turbulence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Scale interactions in magnetohydrodynamic turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scale interactions in magnetohydrodynamic turbulence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-39992