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[snappyHexMesh] Meshing of Nanoparticle

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Old   March 1, 2021, 14:49
Default Meshing of Nanoparticle
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Zach Style
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I am trying to simulate the heating of a nano prolate spheroid in a fluid to compare with analytical results. I created a prolate spheroid in FreeCAD of mm scale and imported it into snappyMultiRegionHeater and have gotten good results. When I try to import nano scale spheroid, I run into errors in snappyHexmesh:

'Cell 1 at (-9e-08 -9.666667e-08 -9.666667e-08) is inside cellZone fluid from locationInMesh (9e-10 9e-10 5.9e-09) but already marked as being in zone ellipse
This can happen if your surfaces are not (sufficiently) closed.'

Does this mean the .stl file exported from FreeCAD has not defined surfaces properly? Are there any other CAD programs that can define an ellipsoid at the nano-scale?

Is there a better way to get around this? I have tried transformPoints -scale('x x x'), but I am not really sure where to define it in snappyHexMeshDict.

Should I try and define and mesh the fluid and particle in Gmsh or any other meshing programs and then bring it over to mutiRegionHeater? Does anybody have any tutorials on this?

Can I define the prolate spheroid in snappyHexMeshDict?

What route do you gals/guys recommend to take?


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meshing 3d, nano

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