Alfvén waves and ideal two-dimensional Galerkin truncated magnetohydrodynamics
Alfvén waves and ideal two-dimensional Galerkin truncated magnetohydrodynamics
We investigate numerically the dynamics of two-dimensional Euler and ideal magnetohydrodynamics (MHD) flows in systems with a finite number of modes, up to ${4096}^{2}$, for which several quadratic invariants are preserved by the truncation and the statistical equilibria are known. Initial conditions are the Orszag-Tang vortex with a neutral X …