[Nek5000-users] Post-Processing from avg_all files using Nek / Visit

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

Hi Shiriam,

It is pretty easy to automate this in VisIt.  As we discussed at the user's
meeting, VisIt treats each spectral element as a 5x5x5, 7x7x7, etc group of
hexahedrons.  Within each hexahedron, there is linear interpolation.

So: if you want help automating this in VisIt, that should be easy.  As far
as accuracy, Nek will clearly do the best job, but hopefully you now
understand better what VisIt is doing...

Best,
Hank

On Thu, Dec 30, 2010 at 10:12 AM, <nek5000-users at lists.mcs.anl.gov> wrote:

> Hi,
>
> I would like to post-process quantities from avg_all files (rms, rm2, avg).
> Particularly I am looking at line plots (mainly) or contours on a plane. I
> had a question regarding the approach that I might be taking..
>
> If I load the files, say rmsblah.f0000* into nek using the load subroutine
> and fill the ux,uy,uz arrays with that of <u^2>, <v^2>, <w^2> and call
> hpts(), how would the interpolation work ? Would it interpolate <u^2> with
> the interpolation that is used for velocities ?. The other option would be
> to do a line plot from Visit and export it to a text file. Also, I am not
> sure how Visit interpolates. Which is more likely to be accurate ?
>
> Regards
> Shriram
>
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