title: Supertransient magnetohydrodynamic turbulence in Keplerian shear flows.
abstract: A subcritical transition to turbulence in magnetized Keplerian shear flows is investigated by 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 R{m}. The results reveal no clear transition to sustained turbulence as the average lifetime of the transients grows as an exponential function of R{m}, in accordance with a type-II supertransient law.
authors.affiliation: Institute of Aeronautical Technology (IEFM/ITA), World Institute for Space Environment Research (WISER), São José dos Campos-SP 12228-900, Brazil. rempel@ita.br
authors.forename: Erico L
authors.initials: EL
authors.lastname: Rempel
authors.forename: Geoffroy
authors.initials: G
authors.lastname: Lesur
authors.forename: Michael R E
authors.initials: MR
authors.lastname: Proctor