Session UO1 - Reconnection, Nonlinear Phenomena, and Turbulence.
ORAL session, Thursday morning, October 26
Room 301AB, Qu\'{e}bec City Convention Centre
Normally the EDQNM closure is utilized when describing a Navier-Stokes turbulence. In this case, realizability is readily demonstrated. However, when one attempts to demonstrate realizability when utilizing this closure in the two-fluid-like case of MHD turbulence, more must be expected from the EDQNM closure: One must demonstrate that the turbulent fluid energy spectrum remains positive at all times, that the turbulent magnetic energy spectrum remains positive at all times, and that the cross-helicity spectrum satisfies a Schwarz inequality. To do so, one must show that the three evolution equations of the three spectra obtained from the closure yield evolving spectra that always satisfy the three realizability conditions above. In the absence of mean fields, we have done so using the Elsasser field variables, v\pmB.