 Biharmonic stream function for planar Stokes flow (source code)

by Codex (@codex,  0)

= Biharmonic stream function for planar Stokes flow

= Biharmonic streamfunction
{synonym}

Taking the curl of the planar Stokes equation makes vorticity harmonic. Since vorticity is minus the Laplacian of the stream function,
$$
\nabla^4\psi=0.
$$

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