[Oreste]

Hi people, newbie here!


I am following this OpenFOAM Intermediate tutorial: https://www.youtube.com/watch?v=sIU1...i_iuE&index=15 to learn how to use the snappyHexMesh utility for a personal project, and I am stuck on topoSetDict and createPatch.



I followed the tutorial step by step, the only difference is the original 3D file used, but when I try to execute the createPatch function to define my inlet, outlet and walls patches, I get an error:

Read 73995 faces from faceSet inputPatch

--> FOAM FATAL ERROR: (openfoam-2012)
Face 26766 specified in set inputPatch is not an external face of the mesh.
This application can only repatch existing boundary faces.

From int main(int, char**)
in file createPatch.C at line 743.

FOAM exiting



I am not sure what the issue is, as I don't understand what I could change to generate the different patches for the simulation. What is a non-external face? Is it an internal face or not a face at all? Then how am I supposed to define the patches?



Here is the mesh in Paraview (this is the shape that I want to study):
https://ibb.co/gMPCLyg


Also, I am not sure why there is a box surrounding my mesh when I change the visible patches (i did not make that box and don't know why it is here). Is that what is causing the problem? The actual mesh I want is internal? I don't know what that means halp.
https://ibb.co/swQqdjs



Here is the topoSetDict file used:


/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2012 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version2.0;
formatascii;
classdictionary;
objecttopoSetDict;
}

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

actions
(

// OUTER BOX
{
nameouterBox;
typefaceSet;
actionnew;
sourcepatchToFace;
sourceInfo {
patch"movingWall";
}
}
{
nameouterBox;
typefaceSet;
actionadd;
sourcepatchToFace;
sourceInfo {
patch"fixedWalls";
}
}
{
nameouterBox;
typefaceSet;
actionadd;
sourcepatchToFace;
sourceInfo {
patch"frontAndBack";
}
}

// FULL CHIP
{
namechipBottomChannel;
typefaceSet;
actionnew;
sourceboxToFace;
sourceInfo {
box (-3.1-14.0-0.7) (3.114.01.9);
}
}
{
namechipBottomChannel;
typefaceSet;
actiondelete;
sourcefaceToFace;
sourceInfo {
setouterBox;
}
}

// NEGATIVES
{
nameinputPatchNegative;
typefaceSet;
actionnew;
sourceboxToFace;
sourceInfo {
boxes
(
(-3.1-13.6-0.7) (3.113.61.4)
(-3.1-14.01.0) (3.1-12.01.9)
);
}
}
{
nameoutputPatchNegative;
typefaceSet;
actionnew;
sourceboxToFace;
sourceInfo {
boxes
(
(-3.1-13.6-0.7) (3.113.61.4)
(-3.112.01.0) (3.114.01.9)
);
}
}


/*new faceSet => INPUT PATCH*/

{
nameinputPatch;
typefaceSet;
actionnew;
sourcefaceToFace;
sourceInfo {
setchipBottomChannel;
}
}
{
nameinputPatch;
typefaceSet;
actiondelete;
sourcefaceToFace;
sourceInfo {
setinputPatchNegative;
}
}


/*new faceSet => OUTPUT PATCH*/
{
nameoutputPatch;
typefaceSet;
actionnew;
sourcefaceToFace;
sourceInfo {
setchipBottomChannel;
}
}
{
nameoutputPatch;
typefaceSet;
actiondelete;
sourcefaceToFace;
sourceInfo {
setoutputPatchNegative;
}
}

/*new faceSet => WALLS*/
{
nameWall;
typefaceSet;
actionnew;
sourcefaceToFace;
sourceInfo {
setchipBottomChannel;
}
}
{
nameWall;
typefaceSet;
actiondelete;
sourcefaceToFace;
sourceInfo {
setinputPatch;
}
}
{
nameWall;
typefaceSet;
actiondelete;
sourcefaceToFace;
sourceInfo {
setoutputPatch;
}
}

);




Thanks a lot for your help, I am new to CFD and this is all very confusing,


~~ Oreste