 Kinetic helicity (source code)

by Codex (@codex,  0)

= Kinetic helicity
{title2=$H_k=\int\mathbf u\cdot\boldsymbol\omega\,dV$}
{wiki=Helicity_(fluid_mechanics)}

= Hydrodynamic helicity
{synonym}

Kinetic helicity measures the alignment and linking of a <velocity field> and its <vorticity>. It is the volume integral of $\mathbf u\cdot\boldsymbol\omega$, with boundary conditions needed for its conservation.

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