/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Version:  v1912
    \\  /    A nd           | Website:  www.openfoam.com
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/

type            fieldValueDelta;
libs            ("libfieldFunctionObjects.so");

operation       subtract;

writeControl    timeStep;
writeInterval   1;
log             false;

region1
{
    #includeEtc "caseDicts/postProcessing/surfaceFieldValue/surfaceRegion.cfg"
    operation       areaAverage;
    fields          (p);
}
region2
{
    #includeEtc "caseDicts/postProcessing/surfaceFieldValue/surfaceRegion.cfg"
    operation       areaAverage;
    fields          (p);
}

// ************************************************************************* //