[Nek5000-users] Visualizing avg_all outputs

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

Hi Paul,

I have avg_all dump frequency defined as equal to iostep so on every run i
got the same amount of blah0.f**** and avgblah0.f**** files. The thing is,
after I execute visnek and open the *.nek5000 with paraview, the
blah.nek5000 has, let's say, 50 timesteps and the avgblah.nek5000 only
shows 3 timesteps out of the same amount of files.

I tried with p68=0 (wich makes iastep=iostep) and p68=10 with the same
result.

Nicolás


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
>
> 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
>>
>>



*Nicolás Andrés Órdenes Leiva*

Estudiante de Ingeniería Civil Mecánica
Universidad Técnica Federico Santa María
Tel: +56 9 7619 2857
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