Supertransient magnetohydrodynamic turbulence in Keplerian shear flows
Earth and Planetary Astrophysics
2015-05-19 v1 High Energy Astrophysical Phenomena
Solar and Stellar Astrophysics
Fluid Dynamics
Abstract
A subcritical transition to turbulence in magnetized Keplerian shear flows is investigated using a statistical approach. Three-dimensional numerical simulations of the shearing box equations with zero net magnetic flux are employed to determine the transition from decaying to sustained turbulence as a function of the magnetic Reynolds number Rm. The results reveal no clear transition to sustained turbulence as the average lifetime of the transients grows as an exponential function of Rm, in accordance with a type-II supertransient law.
Cite
@article{arxiv.1006.5669,
title = {Supertransient magnetohydrodynamic turbulence in Keplerian shear flows},
author = {Erico L. Rempel and Geoffroy Lesur and Michael R. E. Proctor},
journal= {arXiv preprint arXiv:1006.5669},
year = {2015}
}
Comments
4 pages, 5 figures, accepted for publication in Physical Review Letters