| heo |
September 4, 2020 02:52 |
ggi mesh deformation problem
1 Attachment(s)
hi everyone!
I am implementing a piston motion using a foam-extend version.
I tried to use the existing openfoam 4.1 version of ACMI, but as the piston moves, the grid deforms, so I use the foam-extend version of the ggi.
However, despite using ggi, if you look at the attached picture, you can see that the grid at the top of the domain is deformed as the piston moves.
For dynamicmesh, dynamicInkJetFvMesh was used, and the boundary area between the piston and the domain was set to ggi.
How do I avoid grid deformation at the top of the domain?
polyMesh/boundary
Code:
Wedge1
{
type empty;
nFaces 1100;
startFace 13148;
}
Piston
{
type wall;
inGroups 1(wall);
nFaces 50;
startFace 14248;
}
Wedge3
{
type empty;
nFaces 1100;
startFace 14298;
}
SlipWall
{
type wall;
inGroups 1(wall);
nFaces 44;
startFace 15398;
}
Piston_out
{
type ggi;
nFaces 50;
startFace 15442;
shadowPatch Domain_in;
zone pzone;
bridgeOverlap true;
}
Wedge1
{
type empty;
nFaces 5600;
startFace 15492;
}
Wedge2
{
type empty;
nFaces 5600;
startFace 21092;
}
Wall
{
type wall;
inGroups 1(wall);
nFaces 40;
startFace 26692;
}
FarField
{
type patch;
nFaces 50;
startFace 26732;
}
Ypiston
{
type patch;
nFaces 40;
startFace 26782;
}
SlipWall2_Inlet
{
type wall;
inGroups 1(wall);
nFaces 90;
startFace 26822;
}
SlipWall2_Outlet
{
type patch;
nFaces 90;
startFace 26912;
}
Domain_in
{
type ggi;
nFaces 50;
startFace 27002;
shadowPatch Piston_out;
zone dzone;
bridgeOverlap true;
}
)
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