HR: 09:45h
AN: SH51D-07 [Abstracts]
TI: The Scaling Properties of 2D compressible MHD Turbulence: Challenges and Results from High Performence
Computing
AU: Arber, T
EM: T.D.Arber@warwick.ac.uk
AF: Space and Astrophysics, and Centre for Scientific Computing, University of Warwick, Coventry, C
United Kingdom
AU: * Merrifield, J
EM: J.A.Merrifield@warwick.ac.uk
AF: Space and Astrophysics, and Centre for Scientific Computing, University of Warwick, Coventry, C
United Kingdom
AU: Chapman, S C
EM: S.C.Chapman@warwick.ac.uk
AF: Space and Astrophysics, and Centre for Scientific Computing, University of Warwick, Coventry, C
United Kingdom
AU: Dendy, R O
EM: R.O.Dendy@ukaea.org.uk
AF: Culham Science Centre, UKAEA Culham, Abingdon, OX12 8QU
United Kingdom
AB:
In many space, astrophysical and laboratory plasmas, the magnetic Reynolds number is large and the magnetohydrodynamic (MHD)
approximation is valid. In these cases plasmas exhibit MHD turbulence.
Numerical investigations of MHD turbulence presents a significant challenge. In the case of 2D compressible MHD turbulence
numerical challenges include the presence of an inverse cascade in the vector potential, the suppression of turbulent
activity by the chance alignment of the velocity and magnetic fields, the possible link between large and small scale
dynamics by the Alfven effect as discussed by Iroshnikov and Kraichnan and, the lack of dynamo action.
We compare and contrast different methods for the direct numerical simulation of 2D compressible MHD turbulence in the
context of these properties. In particular we compare numerical experiments (driven with decaying), numerical schemes
(high-order finite difference with Lagragian remap) and, the treatment of compressibility (the isothermal approximation with
the solving of an equation of state). We also discuss the computational resources needed to perform these simulations.
DE: 2149 MHD waves and turbulence (2752, 6050, 7836)
DE: 4490 Turbulence (3379, 4568, 7863)
DE: 6050 Plasma and MHD instabilities (2149, 2752, 7836)
DE: 7836 MHD waves and instabilities (2149, 2752, 6050)
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005