Relaxed States of MHD Turbulence: Minimum Dissipation or Minimum Energy?

Relaxed States of a Magnetized Plasma with Minimum Dissipation

Relaxed state of a slightly resistive and turbulent magnetized plasma is obtained by invoking the Principle of Minimum Dissipation which leads to

Dissipation in Compressible Mhd Turbulence

We report results of a three dimensional, high resolution (up to 512) numerical investigation of supersonic compressible magnetohydrodynamic turbulence. We consider both forced and decaying turbulence. The model parameters are appropriate to conditions found in Galactic molecular clouds. We find that the dissipation time of turbulence is of order the flow crossing time or smaller, even in the p...

Prescribed minimum benefits or minimum prescribed benefits?

Ideal MHD turbulence: the inertial range spectrum with collisionless dissipation

The inertial range spectrum of ideal (collisionless/dissipationless) MHD turbulence is analyzed in view of the transition from the large-scale Iroshnikov-Kraichnan-like (IK) to the meso-scale Kolmogorov (K) range under the assumption that the ultimate dissipation which terminates the Kolmogorov range is provided by collisionless reconnection in thin turbulence-generated current sheets. Kolmogor...

Minimum Dissipation Principle in Nonlinear Transport

We extend Onsager’s minimum dissipation principle to stationary states that are only subject to local equilibrium constraints, even when the transport coefficients depend on the thermodynamic forces. Crucial to this generalization is a decomposition of the thermodynamic forces into those that are held fixed by the boundary conditions and the subspace that is orthogonal with respect to the metri...