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How to create a torus region using topoSet

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Old   March 20, 2024, 08:27
Default How to create a torus region using topoSet
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vjp
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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
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Old   March 31, 2024, 23:04
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Wesley Alexander
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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.

Last edited by liftsolemn; April 1, 2024 at 22:04.
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Old   April 2, 2024, 10:31
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vjp
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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):


Quote:
/*--------------------------------*- 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
Quote:
topoSet | tee 2>&1 4-topoSet.log
I have always
Quote:
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.
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