3D Simulations of Principle of Minimum Dissipation Rate

We present preliminary results of a self-consistent, time-dependent numerical simulations of dissipative turbulent plasmas at a higher Landquist number, typically upto 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