[syntex]

Hello,

does anyone know, how to create a patch inside of a Mesh, where you can set fix values for velocity, pressure etc.

I amnaged to do it for a boundary patch, where I coul set fix values, by just editing the numbers in the boundary conditions inside 0/U etc. to be a nonuniform list like they are stored in restart files at different timesteps.

My problem is, that I fail to create a boundary patch inside the mesh, which seems rather logical to me, since boundaries are usually not inside of a mesh.
But like this I can't set fix values to that special face, since in 0/U etc.-files the values are only grouped for different boundary conditions.

I added a little drawing , to visualize the idea (I know it's not good, but it should help to understand me)

I also attached my blockMeshdict and my 0/U-file to give you an idea of what I did.

I want to put the inlet velocity distribution inside the mesh at the red marked face in the last picture

[syntex]

blockMesh

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  5                                     |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}

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


vertices
(
    (-0.5 -0.5 -0.5)
    ( 1   -0.5 -0.5)
    ( 1    0.5 -0.5)
    (-0.5  0.5 -0.5)
    (-0.5 -0.5  0.5)
    ( 1   -0.5  0.5)
    ( 1    0.5  0.5)
    (-0.5  0.5  0.5)
);

blocks
(
    hex (0 1 2 3 4 5 6 7) (45 30 30) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
    upperWall
    {
        type patch;
        faces
        (
            (3 7 6 2)
        );
    }

    lowerWall
    {
        type patch;
        faces
        (
            (1 5 4 0)
        );
    }

    inlet
    {
        type patch;
        faces
        (
            (0 4 7 3)
        );
    }

    outlet
    {
        type patch;
        faces
        (
            (2 6 5 1)
        );
    }

    symFront
    {
        type patch;
        faces
        (
            (4 5 6 7)
        );
    }

    symBack
    {
        type patch;
        faces
        (
            (0 3 2 1)
        );
    }
);

mergePatchPairs
(
);

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

0/U:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  5                                     |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    location    "0";
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#include        "include/initialConditions"

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform $flowVelocity;

boundaryField
{
    inlet 
    {
        type            fixedValue;
        value           nonuniform List<vector>
11304(
(24.99764786 0.0173272802 0.01732712403)
(24.99726486 -0.04879046604 0.004803705961)
...
...
...

(24.99726486 0.04899951816 0.001605197322)
(24.99250984 -0.1716389954 -0.1606982499)
);
}

    outlet
    {
        type            zeroGradient;
    }

    NACA0012
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }

    #include "include/frontBackTopBottomPatches"
}


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