[Nek5000-users] energy dissipation over a subdomain

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

Dear neks!

I would like to compute kinetic energy dissipation over different
subdomains.

It involves the calculation of the dissipation itself in GLL points,
and integration over some domain.

I understand now that it is more accurate to involve whole number of
elements
for integration,
and  that for computation of  the integral over
a subdomain one can use a mask (of 1s and 0es) over the whole domain,
and after that to use global scalar product like glsc3.

Are there the implementations of these ideas?
first of all, the creation of a mask, based on geometrical constructions
like
      IF      (Y.gt.something) THEN
...

and also if somebody has already a procedure of kinetic energy dissipation,
though here it is more strait: calculation of of velocity gradient and
contraction of
its multiplication with itself,

Thank you, Ilias
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