HR: 0800h
AN: NG21A-0206    [Abstracts]
TI: 3D Simulations of Principle of Minimum Dissipation Rate
AU: Mckenzie, J
EM: mckenziej@ukzn.ac.za
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521, United States
AU: * Shaikh, D
EM: dastgeer@ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521, United States
AU: Dasgupta, B
EM: Dasgupta@ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521, United States
AU: Zank, G P
EM: zank@ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521, United States
AU: Hu, Q
EM: qiang.hu@ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521, United States
AB: We present preliminary results of a self-consistent, time-dependent numerical simulations of dissipative turbulent plasmas at a higher Landquist number, typically upto {\cal O}(10⁶), using full three dimensional compressible MHD code with a numerical resolution of 128³. Our simulations follow the time variation of global helicity, magnetic energy, and the dissipation rate and show that the global helicity remains approximately constant while magnetic energy is decaying faster and dissipation rate is decaying even faster than the magnetic energy. This establishes that the principle of minimum dissipation rate under the constraint of (approximate) conservation of global helicity is a viable approach for plasma relaxation
DE: 4400 NONLINEAR GEOPHYSICS (3200, 6944, 7839)
DE: 4490 Turbulence (3379, 4568, 7863)
DE: 7839 Nonlinear phenomena (4400, 6944)
SC: Nonlinear Geophysics [NG]
MN: 2007 Fall Meeting