[vjp]

Hello everyone,

I would like to use a torus region with topoSet but I don't know how to do it.
I already used cylinderToCell, cylinderAnnulusToCell in topoSetDict to post-process some regions but I don't find a way to create a torus region or a volume of revolution around an axis.

Can anyone help me

Thanks in advance

[liftsolemn]

Using the surfaceToCell source, you may use OpenFOAM depending on your version to choose cells inside a surface geography. You ought to be able to obtain what you want if you specify your shape as an STL file.

slice master

[vjp]

Hello liftsolemn,

Thanks for your answer!

I try to do what you explain (the surface specified with the STL file is not torus, it is a cylinder):

/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 8
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object topoSetDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

actions
(
{
name cylindre; // Name of the set
type cellSet; // Set type

action new; // Create a new set
source surfaceToCell; // Use cells as the source
sourceInfo
{
file "constant/triSurface/cylindre.stl";
useSurfaceOrientation false;
outsidePoints ((0 0.03 0));
includeCut true;
includeInside true;
includeOutside false;
nearDistance -1;
curvature -100;

}
}
{
name centre;
type cellZoneSet;
action new;
source setToCellZone;
sourceInfo
{
set cylindre;
}

}
);

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

I define my surface with the stl file "cylindre.stl" but when I run

topoSet | tee 2>&1 4-topoSet.log

I have always

cellSet cylindre now size 0
Created cellZoneSet centre
Applying source setToCellZone
Adding all cells from cellSet cylindre ...
cellZoneSet centre now size 0

It seems that there is nothing inside my surface but i don't understand why. The outsidePoint is outside the surface created.

[Oliviajsdkf]

Originally Posted by vjp

Hello everyone, slope game

I would like to use a torus region with topoSet but I don't know how to do it.
I already used cylinderToCell, cylinderAnnulusToCell in topoSetDict to post-process some regions but I don't find a way to create a torus region or a volume of revolution around an axis.

Can anyone help me

Thanks in advance

In your topoSetDict file, add the following under the "actions" section:
yaml
Copy
- name: torus
type: cellToCell
action: new
source:
type: torus
point1: [x1, y1, z1]
point2: [x2, y2, z2]
majorRadius: R1
minorRadius: R2
Replace the following values:

[x1, y1, z1]: Coordinates of the center of the torus
[x2, y2, z2]: Coordinates of a point on the torus axis
R1: Major radius of the torus
R2: Minor radius of the torus
Run the topoSet command to create the torus region:
python
Copy
topoSet -dict topoSetDict -name torus
This will create a new cell set named "torus" that contains all the cells within the specified torus region.

You can then use this cell set for further post-processing or visualization in OpenFOAM.