| harshabose |
July 5, 2023 09:17 |
Extra patch with 'zero' faces being generated
Hello forum members,
I'm facing an issue while generating a wedge mesh and I would appreciate your insights to help me resolve it. In my blockMeshDict file, I have defined the mesh configuration as shown below:
blockMeshDict file:
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2212 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
R 0.15;
L 1;
X #eval{$R*cos(pi()*0.00625)};
Y #eval{$R*sin(pi()*0.00625)};
XNEG #eval{-$R*cos(pi()*0.00625)};
YNEG #eval{-$R*sin(pi()*0.00625)};
vertices
(
(0 0 0) //0
($X $YNEG 0) //1
($X $Y 0) //2
(0 0 $L) //3
($X $YNEG $L) //4
($X $Y $L) //5
);
blocks
(
hex (1 4 5 2 0 3 3 0) (600 1 80) simpleGrading (1 1 1)
);
edges
(
arc 4 5 (#eval{$R*cos(pi()*0.00625*0.5)} #eval{$R*cos(pi()*0.25)} $L)
arc 1 2 (#eval{$R*cos(pi()*0.00625*0.5)} #eval{$R*cos(pi()*0.25)} 0)
);
boundary
(
inlet
{
type patch;
faces
(
(0 1 2 0)
);
}
outlet
{
type patch;
faces
(
(3 5 4 3)
);
}
walls
{
type wall;
faces
(
(2 1 4 5)
);
}
wedgeX
{
type wedge;
faces
(
(0 2 5 3)
);
}
wedgeY
{
type wedge;
faces
(
(0 3 4 1)
);
}
);
However, during the mesh generation process, an extra patch named "defaultFace" with zero faces is being generated (boundary file below). To proceed with my simulation, I manually deleted this patch, and everything seemed to work fine afterward.
Old boundary file:
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2212 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format binary;
arch "LSB;label=32;scalar=64";
class polyBoundaryMesh;
location "constant/polyMesh";
object boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
6
(
inlet
{
type patch;
nFaces 80;
startFace 95320;
}
outlet
{
type patch;
nFaces 80;
startFace 95400;
}
walls
{
type wall;
inGroups 1(wall);
nFaces 600;
startFace 95480;
}
wedgeX
{
type wedge;
inGroups 1(wedge);
nFaces 48000;
startFace 96080;
}
wedgeY
{
type wedge;
inGroups 1(wedge);
nFaces 48000;
startFace 144080;
}
defaultFaces
{
type empty;
inGroups 1(empty);
nFaces 0;
startFace 192080;
}
)
// ************************************************************************* //
I'm puzzled as to why this "defaultFaces" patch is appearing despite having explicitly defined all the necessary boundary patches. From my understanding, the "defaultFaces" patch should group any external faces that are not assigned a specific patch definition, but in this case, there are zero faces associated with it.
Could you help me understand the possible reasons behind it? Your assistance would be much appreciated.
I have attached the relevant files for reference. Please note that the current case is not fully built, so the simulation won't run at this stage.
Thank you in advance for your time.
Case Link (Google Drive) |
