Directory:
    ${PENCIL_HOME}/samples/helical-MHDturb
SVN Id:
    $Id$
Maintainer:
    Axel Brandenburg <brandenb/nordita[dot]org>
Added:
    08-Jun-2002
Status:
    succeeds # One of [succeeds|failing since <date>|obsolete| ...]
Recommended resolution:
    32x32x32 for nu=eta=5e-3 is fine. For comparison with higher
    resolution runs see Brandenburg (2001, ApJ 550, 824), except that
    there a forcing wavenumber of kf=5 was used. The forcing function
    works with preselected wavevectors that were computed with:
    ${PENCIL_HOME}/samples/helical-MHDturb/idl/generate_kvectors.pro
Comments:
    This is a helical MHD turbulence run. After about 600 time units
    a large scale magnetic field develops from an initially random
    magnetic field (if initaa=0 is set).
References:
    Brandenburg, A.: 2001, ``The inverse cascade and nonlinear
       alpha-effect in simulations of isotropic helical hydromagnetic
       turbulence,'' Astrophys. J. 550, 824-840
    Candelaresi, S., & Brandenburg, A.: 2013, ``How much helicity is
       needed to drive large-scale dynamos?'' Phys. Rev. E 87, 043104