Magnetic helicity

Magnetic helicity is a quantity found in the context of magnetohydrodynamics. It quantifies topological aspects of the magnetic field lines: how much they are linked, twisted, writhed and knotted. When the electrical resistivity of a system is zero, its total magnetic helicity is conserved (it is an ). When a magnetic field contains magnetic helicity, it tends to form large-scale structures from small-scale ones. This process can be referred as an in Fourier space.

Magnetic helicity

Magnetic helicity is a quantity found in the context of magnetohydrodynamics. It quantifies topological aspects of the magnetic field lines: how much they are linked, twisted, writhed and knotted. When the electrical resistivity of a system is zero, its total magnetic helicity is conserved (it is an ). When a magnetic field contains magnetic helicity, it tends to form large-scale structures from small-scale ones. This process can be referred as an in Fourier space.