[olivierdambron]

Hi everyone,

Would you know how to use topoSet to select all the cells within the boundaries of an STL geometry. So far I was using as a source searchableSurfaceToFaceZone, but my fvOption affects the cells located on the faces only.



topoSetDict


actions
(
{
name sprink;
type faceZoneSet;
action new;
source searchableSurfaceToFaceZone;
sourceInfo
{
surface triSurfaceMesh;
name "sprinklers.stl"
useSurfaceOrientation true;
outsidePoints ((1.9965 1.10433 8.35321));
includeCut false;
includeInside true;
includeOutside false;
nearDistance -1;
curvature 0.1;
}
}
{
name sprinklers;
type cellSet;
action new;
source faceZoneToCell;
sourceInfo
{
name sprink;
option master;
}
}



fvOptions

sprinklers
{
type scalarSemiImplicitSource;
active true;

scalarSemiImplicitSourceCoeffs
{
cellSet sprink;
selectionMode cellSet;
volumeMode specific;
injectionRateSuSp
{
h (-27000 0);
}
}
}


thanks for your help

Olivier.

[simrego]

Hi!


How do you generate your mesh? If you are using snappyHexMesh, you can create a cellZone for these cells inside/outside of that STL file if it is a closed surface (it should be).
And you don't even need topoSet. You will have your cellZones after the meshing.

[olivierdambron]

Many thanks simrego!
You solved my issue. Here's what I did inside snappyHexMeshDict for those who may need it:

geometry
{

}
sprinklers.stl
{
type triSurfaceMesh;
name sprinklers;
}

}


refinementSurfaces
{

sprinklers
{
level (0 0);

faceZone faceZone1;
cellZone cellZone1;
cellZoneInside inside;

boundary internal;
}

[farzadmech]

Dear Simrego
What should I do if I generate my mesh from an external source(In my case ansysMeshing), and still I want to add zone in the toposetdict?


Thanks
Farzad

Originally Posted by simrego

Hi!


How do you generate your mesh? If you are using snappyHexMesh, you can create a cellZone for these cells inside/outside of that STL file if it is a closed surface (it should be).
And you don't even need topoSet. You will have your cellZones after the meshing.