foam-extend4.1-coherent-io/applications/utilities/mesh/manipulation/createPatch/createPatchDict

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  1.6                                   |
|   \\  /    A nd           | Web:      http://www.OpenFOAM.org               |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      createPatchDict;
}

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

// This application/dictionary controls:
// - optional: create new patches from boundary faces (either given as
//   a set of patches or as a faceSet)
// - always: order faces on coupled patches such that they are opposite. This
//   is done for all coupled faces, not just for any patches created.
// - optional: synchronise points on coupled patches.

// 1. Create cyclic:
// - specify where the faces should come from
// - specify the type of cyclic. If a rotational specify the rotationAxis
//   and centre to make matching easier
// - pointSync true to guarantee points to line up.

// 2. Correct incorrect cyclic:
// This will usually fail upon loading:
//  "face 0 area does not match neighbour 2 by 0.0100005%"
//  " -- possible face ordering problem."
// - change patch type from 'cyclic' to 'patch' in the polyMesh/boundary file.
// - loosen match tolerance to get case to load
// - regenerate cyclic as above


// Tolerance used in matching faces. Absolute tolerance is span of
// face times this factor. To load incorrectly matches meshes set this
// to a higher value.
matchTolerance 1E-3;

// Do a synchronisation of coupled points after creation of any patches.
// Note: this does not work with points that are on multiple coupled patches
//       with transformations.
pointSync true;

// Patches to create.
patchInfo
(
    {
        // Name of new patch
        name sidePatches;

        // Type of new patch
        dictionary
        {
            type cyclic;

            // Optional: explicitly set transformation tensor.
            // Used when matching and synchronising points.
            //transform translational;
            //separationVector (-2289 0 0);
            transform rotational;
            rotationAxis (1 0 0);
            rotationCentre (0 0 0);
        }

        // How to construct: either from 'patches' or 'set'
        constructFrom patches;

        // If constructFrom = patches : names of patches. Wildcards allowed.
        patches ("periodic.*");

        // If constructFrom = set : name of faceSet
        set f0;
    }

    {
        name bottom;

        // Type of new patch
        dictionary
        {
            type wall;
        }

        constructFrom set;

        patches ();

        set bottomFaces;
    }

);

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