1. Aug 1, 2008

### Topher925

Just a really quick sanity check. This equation...

$$\nabla$$sU = $$\nabla$$U - n*(n $$\bullet$$ $$\nabla$$U)

...the correct equation for the surface gradient given $$\nabla$$U is the gradient of the surface and n is the normal unit vector?

2. Aug 1, 2008

### Hootenanny

Staff Emeritus
Looks good to me