[ofWorld]

Hi foamers,

I'd like to assign separate patch names to the inner and outer walls of a cylinder tube as attached. I used the topoSet utility to extract faces belonging to the inner wall, followed by createPatch to rename them as a patch. The inner-wall faceSet is successfully created and appears in constant/polyMesh/sets, but after running createPatch, the resulting mesh shows the patch name but with 0 faces.

Has anyone encountered this issue before, or could advise what I might be doing wrong? Is there any idea to help me out with this issue?

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  10
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       dictionary;
    object      topoSetDict;
}

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

actions
(
    {
        name    cylinder1;
        type    cellSet;
        action  new;
        source  cylinderToCell;
        sourceInfo
        {
	    p1 (0.1554 0 0.1514);
	    p2 (0.1554 0 0.2234);
            radius 0.004;
        }
    }
    /*{
        name    cylinder2;
        type    cellSet;
        action  new;
        source  cylinderToCell;
        sourceInfo
        {

	    p1 (0.1554 0 0.185);
	    p2 (0.2 0 0.185);
            radius 0.003;
        }
    }*/
    {
        name    inner-wall;
        type    faceSet;
        action  new;
        source  cellToFace;

        sourceInfo
        {
            set cylinder1;
            option  all;
        }
    }
    {
        name    inner-wall;
        type    faceSet;
        action  subset;
        source  patchToFace;
        sourceInfo
        {
            name "fluidToSolid";
        }
    }
);

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

patches
(
    {
        // Name of new patch
        name inner-wall;

        // Dictionary to construct new patch from
        patchInfo
        {
            type wall;
        }

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

        // If constructFrom = patches : names of patches. Wildcards allowed.
        set inner-wall;
    }

);

Many thanks in advance.

Best wishes,
Guanqi

[ofWorld]

Hello everyone,

I am trying to create an internal interface patch between the fluid and solid regions generated in OpenFOAM 10. I used an STL file of the internal wall (fluidToSolid.stl) together with topoSet to select the interface faces. However, no matter how I adjust the nearDistance parameter, I only get a partial selection — the resulting patches are incomplete.

Here is the relevant part of my boundary file after running createPatch:

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  10
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       polyBoundaryMesh;
    location    "1e-05/polyMesh";
    object      boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

5
(
    fluidGraftInlet
    {
        type            wall;
        inGroups        List<word> 1(wall);
        nFaces          32;
        startFace       17454;
    }
    fluidVeinInlet
    {
        type            wall;
        inGroups        List<word> 1(wall);
        nFaces          56;
        startFace       17486;
    }
    fluidVeinOutlet
    {
        type            wall;
        inGroups        List<word> 1(wall);
        nFaces          44;
        startFace       17542;
    }
    fluidToSolid
    {
        type            wall;
        inGroups        List<word> 1(wall);
        nFaces          2;
        startFace       17586;
    }
    solid_to_fluid
    {
        type            patch;
        nFaces          17478;
        startFace       17588;
    }
)

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

Here is the topoSetDict with stl file:

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  10
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       dictionary;
    object      topoSetDict;
}

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

actions
(
    {
        name    inner-cells;
        type    cellSet;
        action  new;
        source  surfaceToCell;
        sourceInfo
        {
	    file "constant/geometry/fluidToSolid.stl";
	    outsidePoints (
(0.151308 0.00186969 0.208)
);
            includeCut true;
            includeInside true;
            includeOutside false;
            nearDistance 1e-4; // cells with centre near surf
                             // (set to -1 if not used)
            curvature 0; // cells within nearDistance
                            // and near surf curvature
                            // (set to -100 if not used)
        }
    }
    {
        name    inner-wall;
        type    faceSet;
        action  new;
        source  cellToFace;

        sourceInfo
        {
            set inner-cells;
            option  all;
        }
    }
    {
        name    inner-wall;
        type    faceSet;
        action  subset;
        source  patchToFace;
        sourceInfo
        {
            name "fluidToSolid";
        }
    }
);

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