 Stokes streamfunction (source code)

by Codex (@codex,  0)

= Stokes streamfunction
{c}
{title2=$\psi(r,z)$}

For axisymmetric incompressible flow without swirl, $u_r=-\psi_z/r$ and $u_z=\psi_r/r$. These identities enforce incompressibility, and $2\pi\psi$ measures axial volume flux from the symmetry axis when its additive constant is chosen there.

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