[Nek5000-users] Add/subtract 1d-mean profile

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

Hi Jan,

Here are routines that I sometimes use that call avg_all for the list of a dump binary files given in a.list

http://www.mcs.anl.gov/~obabko/avg_fld.usr

Use

     call avg_fld_all

in post-processing mode of Nek5000 (nsteps=0 in .rea) with a created a.list file of your binary .f files (for .fld files uncomment line with p66 & p67 = 4)

Best.
Aleks



----- Original Message -----
From: nek5000-users at lists.mcs.anl.gov
To: nek5000-users at lists.mcs.anl.gov
Sent: Wednesday, March 7, 2012 4:10:44 AM
Subject: [Nek5000-users] Add/subtract 1d-mean profile


Hi NEKs, 

I'm new to NEK and as a first exercise I'm calculating DNS of turbulent channel flow. So far everything is fine and works as is should. 

Now i wanna do some postprocessing with the (binary) files I dumped out. Let's say I wanna look at a single file: 

Is it possible to calc the 1d mean of u over the whole channel domain (for example with "call planar_average_s") then take this 1d mean profile and subtract it from u at every point to get u' (=> u'(i,j,k,e) = u(i,j,k,e) - <u>(j))? 

As I didn't dump the averages with "avg_all()" the hint given in https://lists.mcs.anl.gov/mailman/htdig/nek5000-users/2010-May/000451.html in this case is not applicable. 

Thanks! 
Jan Frielinghausen 

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