Importing Solidworks and Meshing

Topics: Geometry, Mesh, 4.2a

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Alfredo Gutierrez

Alfredo Gutierrez

April 17, 2013 8:21pm UTC

Importing Solidworks and Meshing

Hello,

I am fairly new to COMSOL, but am wondering if there is a quick way to import a 3D model from solidworks, let's say a valve, and be able to generate the "empty" space within the valve, which will then be meshed and studied using the laminar flow and heat transfer studies? Or would I have to generate the "empty" space within solidworks and then import that into COMSOL for meshing and analysis?

Thank you in advance for your time and replies.

Regards,
Alfredo

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Sri Puranam

Sri Puranam

April 17, 2013 10:21pm UTC in response to Alfredo Gutierrez

Re: Importing Solidworks and Meshing

I have the same issue. I was not able to find any simple solutions. My suggestions are:

1) If possible re-create the geometry in COMSOL. I have found that it is way easier to mesh a solid created in COMSOL as opposed to an imported solid.

2) If you cannot re-create the geometry in COMSOL, make the "fluid-solid" in SolidWorks. Creating a "fluid-solid" in COMSOL is not easy for complicated geometries such as a fuel valve.

Sri.

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Alfredo Gutierrez

Alfredo Gutierrez

April 17, 2013 11:00pm UTC in response to Sri Puranam

Re: Importing Solidworks and Meshing

Hi Sri,

Thank you for the reply. I will go ahead and try to create the "fluid-solid" in solidworks and import that into COMSOL.

Regards,
Alfredo

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James  Freels

James Freels

April 18, 2013 12:56am UTC in response to Alfredo Gutierrez

Re: Importing Solidworks and Meshing

If you have the CAD import module, then you have all that you need to generate the fluid domain within the void space of the solidworks geometry. If is necessary to use the "caps" feature, which turns out, is also part of the CAD import module. So, unless you have the CAD import module, you will not see the "caps" feature. It is really easy to use. You "cap" off the flow areas in/out of the solid domains, and then a new "fluid" domain is created within. Sometimes you may need to "clean up" the newly created fluid region depending on how smooth the wall features of the solid are. Once this is done, you can then mesh the new fluid region and do you analysis.

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Alfredo Gutierrez

Alfredo Gutierrez

April 18, 2013 1:20am UTC in response to James Freels

Re: Importing Solidworks and Meshing

James,

How would I know if I have the CAD import module? That sounds like a silly question, but I only ask because I was able to import a parasolid file, but I do not see the "caps" feature. I may just not have the import module, but is there an easy check to see if I do have it?

Regards,
Alfredo

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Ivar Kjelberg

Ivar Kjelberg

April 18, 2013 5:12am UTC in response to Alfredo Gutierrez

Re: Importing Solidworks and Meshing

Hi

the CAP normally appears in the first section under "import" but only for 3D and when you have imported a CAD part of appropriate graphics Kernel, at least working with SolidWorks and Parasolid files imports

--
Good luck
Ivar

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Alfredo Gutierrez

Alfredo Gutierrez

April 18, 2013 2:38pm UTC in response to Ivar Kjelberg

Re: Importing Solidworks and Meshing

Hi Ivar,

Thank you for clarifying. I will take a look and see if I have this feature. I hope I do in fact have it, as it sounds like it would make creating the "fluid-solid" a lot easier.

Regards,
Alfredo

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James  Freels

James Freels

April 18, 2013 6:38pm UTC in response to Alfredo Gutierrez

Re: Importing Solidworks and Meshing

From memory, because my comsol is running right now ...

Click help button, about comsol, show licenses

You need to purchase cad import module separately. You need the cad import kernel to have the caps feature.

If your geometry is simple enough, you may be able to use boolean operators to difference, interrsect, etc. to retrieve the empty inside of an object.

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Alfredo Gutierrez

Alfredo Gutierrez

April 18, 2013 10:03pm UTC in response to James Freels

Re: Importing Solidworks and Meshing

James,

It turns out I do have the option of cap faces!! However, once the faces are capped, how can I remove the rest of the domain, so as to only keep the "fluid-solid?"

Regards,
Alfredo

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Alfredo Gutierrez

Alfredo Gutierrez

April 18, 2013 10:46pm UTC in response to Alfredo Gutierrez

Re: Importing Solidworks and Meshing

James,

Actually, I think I figured it out.

Thank you and everyone else for all of your help, I really appreciate it!!

Regards,
Alfredo

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