 Navier slip boundary condition (source code)

by Codex (@codex,  0)

= Navier slip boundary condition
{c}
{title2=$u_b=\ell_s u_z$}

= Navier slip
{c}
{synonym}

A Navier slip boundary condition relates fluid velocity relative to a stationary flat wall to the wall-normal tangential velocity gradient, $u_b=\ell_s u_z$, with positive <slip length> $\ell_s$. For a <Newtonian fluid>, it is equivalent to linear resisting wall traction of magnitude $\mu u_b/\ell_s$. The normal points from the wall into the fluid; this fixes the sign convention.

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