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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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import CAD files

Posted May 8, 2011, 4:27 p.m. EDT Geometry Version 4.1 3 Replies

Andre Fulgar
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hello,
I've tried comsol and I tried to import a CAD file in step format (*.STP) created from Rhinoceros 3D export.
the model is a bog pipe which is crossed by a smaller one and the model looks like a T. My problem is that the common section between the 2 pipes is a hole on my model and in comsol multyphysics after being imported, this crossed section is filled with littles surfaces.
And If I try with parasolid format *.x_t I've got a message "the geometry contains an entity without manifold)

Do someone know why ?
thanks for your help

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3 Replies Last Post May 9, 2011, 5:03 p.m. EDT
Amir Fadel
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Posted: 1 decade ago May 8, 2011, 4:34 p.m. EDT
Hi,

I have been having a lot of issues with the CAD importer and so far I have not received an answer from support yet.
Mostly Comsol sees separated surfaces where there should be an only one.
Off the top of my head I would say try using the Comsol design tool which I think can handle th egeometry you have.

Cheers
Hi, I have been having a lot of issues with the CAD importer and so far I have not received an answer from support yet. Mostly Comsol sees separated surfaces where there should be an only one. Off the top of my head I would say try using the Comsol design tool which I think can handle th egeometry you have. Cheers
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 8, 2011, 5:58 p.m. EDT
Hi

I have no problems with CAD import, provided I import solids and not shell surfaces, as these are not easy to knit correctly together (neither for COMSOL nor for any other programme), I suspect that in your options you have a surface and not volume export option active

--
Good luck
Ivar
Hi I have no problems with CAD import, provided I import solids and not shell surfaces, as these are not easy to knit correctly together (neither for COMSOL nor for any other programme), I suspect that in your options you have a surface and not volume export option active -- Good luck Ivar
Andre Fulgar
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Posted: 1 decade ago May 9, 2011, 5:03 p.m. EDT
thank you,

But i've checked if there was an option like this in Rhino and I didn't find that.
I will check again.
thank you, But i've checked if there was an option like this in Rhino and I didn't find that. I will check again.

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