Controling openfoam output

[primer]

Hi,

I would like to limit the amount data being written to disk for large runs. I have been running cases which have involved many time steps. Each time step generates large files for many calculated parameters which I am not interested in. Is there a way to control which parameters are written to disk? I have seen some reference to this but what I have tried does not work. For instance, it has been suggested that the following be put in the function's section of the system/controlDict file.

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    writeObjects1
      {
	type        writeObjects;
	libs        ("libutilityFunctionObjects.so");
	objects     (rho nut alphat k Ma pseudoCoField);
	writeOption noWrite;
      }
    writeObjects2
      {
	type        writeObjects;
	libs        ("libutilityFunctionObjects.so");
	objects     (U p T);
	writeOption autoWrite;
      }

If this is an approach, what I'm I doing wrong? I am using openfoam-v9.

Additionally, the way I have my domain boundary configured, I am only interested in the domain surface fields for the U p and T variables. It is a shame to write out the volume fields. I have inserted the line #includeFunc surfaces in the system.controlDict file and put this file in the system directory

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{
  type surfaces;
  libs            ("libsampling.so");
  writeControl    adjustableRunTime;
  writeInterval   1e-06;;

  interpolationScheme cellPoint;
  surfaceFormat vtk;
  writeFormat     binary;

  surfaces
    (
     domain_bndy1
     {
       type    patch;
       patches (inlet, outlet, constraint);
       interpolate true;
       triangulate false;
     }
     );

  fields          (T U p);
}

I generated the anticipated vtk files but I get an error when I use paraview to render the files. The error I get is

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ERROR: In vtkOpenFOAMReader.cxx, line 11302
vtkPOpenFOAMReader (0x1b593080): Cannot open directory: /tmp/cfdof/case/postProcessing/surfaces/0.0001/constant/

ERROR: In vtkExecutive.cxx, line 741
vtkPVCompositeDataPipeline (0x1b6a1ca0): Algorithm vtkPOpenFOAMReader (0x1b593080) returned failure for request: vtkInformation (0x1b53b450)
  Debug: Off
  Modified Time: 1321417
  Reference Count: 1
  Registered Events: (none)
  Request: REQUEST_INFORMATION
  ALGORITHM_AFTER_FORWARD: 1
  FORWARD_DIRECTION: 0

Any thoughts on these issues is appreciated. Also, how does one close old posts?

primer

Code: Select all

OS: Fedora Linux 37 (MATE-Compiz) (MATE/mate)
Word size of FreeCAD: 64-bit
Version: 0.20.2.Unknown
Build type: Unknown
Python 3.11.1, Qt 5.15.8, Coin 4.0.0, Vtk 9.1.0, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * Plot 2022.4.17
  * FeedsAndSpeeds 0.5.0
  * Help 1.0.3
  * CfdOF 1.24.5

[chrisb]

Please edit your post and put the code in code tags using the button </>. That makes the post easier to read and shows immediately the indentations.