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Postprocess utility : I am lost

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Old   February 28, 2018, 04:41
Default Postprocess utility : I am lost
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I am trying to use the postProcess utility to get data at probe locations.

Here is my probe function file located in the system of my case. The sensors file contains a huge list of probes locations

Code:
/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Web:      www.OpenFOAM.org
     \\/     M anipulation  |
-------------------------------------------------------------------------------
Description
    Writes out values of fields from cells nearest to specified locations.

\*---------------------------------------------------------------------------*/

#includeEtc "caseDicts/postProcessing/probes/probes.cfg"

fields (p U alpha);

probeLocations
(
#include "sensors"
);
Now, executing

Code:
Postprocess -func probes
Does not work as intended. I get data in postProcessing/probes for only the two first time steps (the 0 and 0.10001) and the second timestep does not even contain all required fields (only the p file)

Now, if I execute

Code:
postProcess -func probes -latestTime
It works perfectly and I get the desired data.

So how can I get the same data but for all time steps present in my case folder ?
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Old   February 28, 2018, 06:15
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Uwe Pilz
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I dont know why

Code:
Postprocess -func probes
doesn't work. But until you found that out you may use

Code:
Postprocess -func probes -time <numberOfTheTimeFolder>
for every time you need it.
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Old   February 28, 2018, 07:42
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Indeed this is a workaround.
Amazing thing is that

Code:
Postprocess -func probes -time 0.2999
works but

Code:
Postprocess -func probes -time 0:1
will not produce anything (except again for the first two time directories)
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Old   February 28, 2018, 08:07
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I feel this is somehow related to the following warning message

Code:
--> FOAM Warning :
    From function void Foam::Time::setControls()
    in file db/Time/Time.C at line 214
    Increasing the timePrecision from 6 to 18 to support the formatting of the current time directory 29.2000222392333768
#####

EDIT

Another thing I don't get is that I have two identical data lines for each time step i.e. in postProcessing/probes/timeXX I have :

Code:
#time probe1 probe2 ... probeN
XX      A         B         ... C
XX      A         B         ... C
Am i not supposed to only get one line per time directory ?

Last edited by Gearb0x; March 1, 2018 at 01:30.
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Old   July 7, 2019, 14:27
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Quote:
Originally Posted by Gearb0x View Post
Indeed this is a workaround.
Amazing thing is that

Code:
Postprocess -func probes -time 0.2999
works but

Code:
Postprocess -func probes -time 0:1
will not produce anything (except again for the first two time directories)
I know this is a old post but I wanted to share that:
Code:
Postprocess -func probes -time '1, 2, 3, 4, 5'

will gave data from 1, 2, 3, 4 , 5th sec or iterations(depending on transient or st-st) data. If anyone knows how to set interval like "1:5" (matlab habits doesnt work, sadly) I'll also be happy.
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