ENH: Lagrangian - added new PatchInteractionFields cloud function object

Creates volume fields whose boundaries are used to store patch interaction statistics.

Current field output per patch face:

• <cloud><model>:count - cumulative particle hits
• <cloud><model>:mass - cumuluative mass of hitting particles

Fields can be reset according to:

• none: fields are not reset
• timeStep: reset at each time step
• writeTime: reset at each write time

Usage

patchInteractionFields1
{
    type            patchInteractionFields;
    resetMode       writeTime;
}

See test case $FOAM_TUTORIALS/lagrangian/reactingParcelFoam/filter

changed milestone to %v2012

added enhancement library post-processing labels

@kuti - can you take for a spin/test?

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approved this merge request

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added 49 commits

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• 9d765ada - ENH: Lagrangian - added new PatchInteractionFields cloud function object

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thanks @kuti

mentioned in commit 4a166c6f

merged