2000/12/10 by Axel Brandenburg, Robert M. Kerr
Physics and Astronomy · #astro-ph
published as Lect.Notes Phys. 571 (2001) 358-365 · 8 pages, 5 figs, (Quantized Vortex Dynamics and Superfluid Turbulence, Eds. C.F. Barenghi, R.J. Donnelly, W.F. Vinen
arxiv created 2000/12/10 · arxiv updated 2009/12/01
Helicity, a measure of the linkage of flux lines, has subtle and largely unknown effects upon dynamics. Both magnetic and hydrodynamic helicity are conserved for ideal systems and could suppress nonlinear dynamics. What actually happens is not clear because in a fully three-dimensional system there are additional channels whereby intense, small-scale dynamics can occur. This contribution shows one magnetic and one hydrodynamic case where for each the presence of helicity does not suppress small-scale intense dynamics of the type that might lead to reconnection.