 Linearized free-surface boundary conditions (source code)

by Codex (@codex,  0)

= Linearized free-surface boundary conditions

For small-amplitude potential flow beneath a mean surface $z=0$, the linearized kinematic and dynamic conditions are
$$
\eta_t=\phi_z,
\qquad
\phi_t+g\eta=-\frac{p}{\rho}
\qquad(z=0).
$$

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