[spalartallmaras]

Hi,

I simulate channel flow and I want to do postprocessing with columnAverage.

But columnAverage works well with fields (U p);

not with fields (UMean UPrime2Mean wallShearStressMean);

columnAverage
	{
    	  type        columnAverage;
          libs        ("libfieldFunctionObjects.so");
   	  writeControl    writeTime;
  	  patches     (inout2_half0 inout2_half1); //unten_inlet_outlet
	  //patches     (inout1_half0 inout1_half1);
  	  fields      (UMean UPrime2Mean wallShearStressMean);
	}

Does anyone have Idea for the problem?

[spalartallmaras]

if I start postProcess -dict system/controlDict -latestTime


OpenFOAM cannot find U p UMean and UPrime2Mean in the result folder, even there are results!

bash-4.2# postProcess -dict system/controlDict -latestTime
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v1912                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : _f3950763fe-20191219 OPENFOAM=1912
Arch   : "LSB;label=32;scalar=64"
Exec   : postProcess -dict system/controlDict -latestTime
Date   : Jan 23 2020
Time   : 16:41:19
Host   : 660b166e447b
PID    : 6029
I/O    : uncollated
Case   : /root/platte/OpenFOAM/halloleute/run/kanal_WALE/kanal_180
nProcs : 1
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 4999.97413939496982

Time = 4999.97413939496982

Reading fields:

Executing functionObjects
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field U not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field UMean not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field UPrime2Mean not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field p not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field columnAverage:columnAverage(U) not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field columnAverage:columnAverage(UPrime2Mean) not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field columnAverage:columnAverage(p) not found
--> FOAM Warning : 
    From function virtual bool Foam::functionObjects::fieldSelection::checkSelection()
    in file functionObjects/fieldSelections/fieldSelection/fieldSelection.C at line 166
    Field columnAverage:columnAverage(UMean) not found

End

[virengos]

Hi,
Usually I take a detour for such post-processing operations. Assuming the raw data is already available.

I import all the data (e.g. CSV) into a python pandas data frame, make the required modifications (statistics) and create a nice output for plotting with matplotlib or ParaView. All this stuff during run-time
best,
Damian