[Nek5000-users] Total energy and wall gradients

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

Hi JC,

It's not clear to me how surf_int relates to total energy - What
is it that you wish to compute?  Is it the volume integral of
p + 1/2 rho U^2 ? ... or ... ?

Regarding computation of WSS, you might also get some ideas by
looking at comp_torq() in navier5.f in the source directory.

Let us know if this clarifies at all and we'll try to help further.

Paul


On Mon, 19 Jul 2010, nek5000-users at lists.mcs.anl.gov wrote:

> Hi Nek's,
>
> I am about to run a 3D-stenotic flow DNS, and I would like to compute the 
> total energy in the computational domain. So far, I have only a routine for 
> 2D (surf_int). Does such a 3D routine exists?
> My second question concern the velocity gradient normal to the wall. Is there 
> any way to output its value at various wall points for each time step? I was 
> thinking ofadding a few lines to the hpts routine, but I am sure about what 
> to write exactly. Could anyone give me a clue?
>
> Sincerely,
> JC
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