FoamFile {
  version     2.0;
  format      ascii;
  class       polyBoundaryMesh;
  location    "constant/polyMesh";
  object      boundary;
}

3
(
bottom {
  type wall;
  inGroups        1(wall);
  nFaces 540;
  startFace 49842;
}
porousMat_to_subMat1 {
  type            mappedWall;
  inGroups        1(wall);
  sampleMode      nearestPatchFace;
  sampleRegion    subMat1;
  samplePatch     subMat1_to_porousMat;
  nFaces 1728;
  startFace 50382;
}
top {
  type wall;
  inGroups        1(wall);
  nFaces 1728;
  startFace 52110;
}
)
