CFD Online Discussion Forums - [swak4Foam] Calculating a sequence of zone averages with swak4Foam

Dear forum,

I do simulations on a straight pipe and would like to extract pressure averaged over the radial plane at specific locations. Of course for the inlet and outlet patches one could use

Code:

patchAverage -latestTime p <patch>

and for single planes within the domain swak4Foam is a suitable option.

For that I am using this functionObject definition in controlDict

Code:

p0

  {

      type swakExpression;

      valueType surface;

      surfaceName p0;

      surface {

          type plane;

          basePoint       (0 0 0.001);

          normalVector    (1 0 0);

          interpolate     false;

      }

      verbose true;

      accumulations ( weightedAverage );

      outputControlMode timeStep;

      outputInterval 1;

      expression "p";

  }

This gives me for a single basePoint, i.e. a single plane, the pressure averaged over the area of the plane. Using

Code:

execFlowFunctionObjects -latestTime

writes a nice output file in the postProcessing dir, such as:

Code:

#                  Time       weightedAverage

                 35000      1.86158477779654

However, I'd like to know if swak4Foam also offers the possibility to extract averages for multiple basePoints, i.e. multiple planes, and writes the result into a single file. Of course I am aware of the option to define multiple functionObjects. But, this gives also multiple output files. I am doing this so far and extracting the data using another python script. However, I'd like to know if swak4Foam offers a cleaner solution to my problem.

Any suggestions are more than welcome!

Thank you very much!

Martin