# uc_dncdzeta¶

Build derivative of

$\boldsymbol{u}_c\frac{\partial\boldsymbol{n}_c}{\partial\boldsymbol{zeta}}$

where $$\boldsymbol{u}_c$$ is the total velocity at the collocation points.

param Surf

the input can also be a list of surface.AerogridSurface

type Surf

surface.AerogridSurface

References