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Updated: Jul 17, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
Small-scale structures in three-dimensional magnetohydrodynamic turbulence
P D Mininni1, A G Pouquet, D C Montgomery
1National Center for Atmospheric Research, P.O. Box 3000, Boulder, Colorado 80307, USA.
Abstract:
We investigate using direct numerical simulations with grids up to 1536(3) points, the rate at which small scales develop in a decaying three-dimensional MHD flow both for deterministic and random initial conditions. Parallel current and vorticity sheets form at the same spatial locations, and further destabilize and fold or roll up after an initial exponential phase. At high Reynolds numbers, a self-similar evolution of the current and vorticity maxima is found, in which they grow as a cubic power of time; the flow then reaches a finite dissipation rate independent of the Reynolds number.
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