Random rndGen(653213);

// Determine mesh bounding boxes:
List<treeBoundBox> meshBb
(
    1,
    treeBoundBox
    (
        boundBox(coarseMesh.points(), false)
    ).extend(rndGen, 1E-3)
);

// Dummy bounds dictionary
dictionary dict;
dict.add("bounds", meshBb);
dict.add
(
    "distributionType",
    distributedTriSurfaceMesh::distributionTypeNames_
    [
        distributedTriSurfaceMesh::FROZEN
    ]
);
dict.add("mergeDistance", SMALL);

labelHashSet includePatches;
forAll(patches, patchI)
{
    if (!isA<processorPolyPatch>(patches[patchI]))
    {
        includePatches.insert(patchI);
    }
}

distributedTriSurfaceMesh surfacesMesh
(
    IOobject
    (
        "wallSurface.stl",
        runTime.constant(),     // directory
        "triSurface",           // instance
        runTime,                // registry
        IOobject::NO_READ,
        IOobject::NO_WRITE
    ),
    triSurfaceTools::triangulate
    (
        patches,
        includePatches
    ),
    dict
);

//surfacesMesh.searchableSurface::write();