[Nek5000-users] Visualizing avg_all outputs

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

Hi Nicolas,


Frequency of the average output is controlled by param 68.

Default I believe is 500 if p68=0.


Note that if you output avg files every time step it will look just like

a regular f0000 file because each avg file is just an average over the

steps from the previous avg output step.  So, in the case of p68=500,

avgx0.f00001 would have the average for steps 1-500; ...02 would have

501 to 1000; etc.


hth,


Paul


________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Wednesday, July 4, 2018 5:27:07 PM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] Visualizing avg_all outputs

Dear Neks,

I'm running some cases of natural convection flows inside a box domain and I want to compute and visualize turbulent statistics of the velocity fields.

I tried this workflow:
- Call avg_all on every usrchk execution, thus I got a avg/rms/rm2-blah0.f* file for each iostep.
- Execute visnek for each series of *blah0.f* files
- Open the *.nek5000 files on paraview.

blah.nek5000 works fine, showing all fields on every timestep, but for the avg,rms and rm2 series I only a few timesteps 'frames' out of all the *blah0.f* files.


Last test I ran was:

p010 = 100 seconds
p015 = 50
p068 = 0

which outputted 200 *blah0.f* from where I got 200 timesteps frames for regular blah0.f* and only 4 timesteps for the avg_all fields.

I would like some advice on how to properly generate the avg_all files or the post-processing workflow requiered to get a 'smooth' visualizing of the statistics.


Regards,

Nicolás
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