[Nek5000-users] Integrate velocity field along a line

[nek5000-users at lists.mcs.anl.gov]

Good morning Neks!

I was wondering if it possible to integrate a function over the boundary 
in the userchk. Let me develop :
The domain is a box, I want to integrate the boundary velocity field 
(prescribed in userbc)  at the wall (bottom boundary) :

In latex it would be int_{bottom boundary } u_{bound}^2 + v_{bound}^2 + 
w_{bound}^2v dx_{bound}

Is there a function like glsc3() that would allow me to do so?

Thank you for your time,

Best wishes,

Arnold