# FSI using CT-images - need more geometries!?

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 August 6, 2008, 08:48 FSI using CT-images - need more geometries!? #1 Liza Guest   Posts: n/a Hi all, I have a geometry from CT-images at four different times which I want to perform a FSI-simulation on. It's 0.25 s between each geometry, and I want to get more geometries to be able to do a more realistic FSI. I have looked into tutorial 20 (check valve with 20 meshes) and it seems to suit me, the only thing I need now is the meshes. So my problem is that I only have 4 geometries and I need 100. Is there an easy way to "interpolate" and save geometries in CFX or do I need to use an external CAD program? Or should I do it in some other way? Cheers Liza

 August 6, 2008, 09:50 Re: FSI using CT-images - need more geometries!? #2 Jorn Guest   Posts: n/a I know people use the software Mimics to generate meshes from CT images for use in Ansys/CFX. I don't know if it can interpolate though.

 August 6, 2008, 12:19 Re: FSI using CT-images - need more geometries!? #3 Rogerio Fernandes Brito Guest   Posts: n/a Please, Mr. Liza, tell us about this scheme. I didnīt understand very much this methodology. Thanks

 August 7, 2008, 02:14 Re: FSI using CT-images - need more geometries!? #4 Liza Guest   Posts: n/a First of all, it's MISS and not MR... So, say that I have a geometery at time = 0 and one geometry at time = 0.25, 0.75, and 1.00. To be able to perform a FSI in the same way as in tutorial 20, I need meshes at time = 0.01, 0.02, 0.03 and so on, if my time step is going to be 0.01. So I was wondering if CFX has any capabilities to perform a interpolation between time = 0 and 0.25 to get the intermediate geometries, or if I have to use another CAD program. Or (preferably?) if I can solve my problem in another way? Cheers Liza

 August 7, 2008, 07:37 Re: FSI using CT-images - need more geometries!? #5 Rogerio Fernandes Brito Guest   Posts: n/a Did your geometry change with the time?

 August 7, 2008, 08:31 Re: FSI using CT-images - need more geometries!? #6 Liza Guest   Posts: n/a Yes of course - thats why Im trying to do a one-way FSI...

 August 7, 2008, 21:32 Re: FSI using CT-images - need more geometries!? #7 Rogerio Fernandes Brito Guest   Posts: n/a Thanks lady Lisa!

 August 8, 2008, 02:47 Re: FSI using CT-images - need more geometries!? #8 Liza Guest   Posts: n/a ??

 August 8, 2008, 15:42 Re: FSI using CT-images - need more geometries!? #9 brunoc Guest   Posts: n/a Sorry, Post won't do that for you. You'll have to do it externally.

 August 11, 2008, 06:14 Re: FSI using CT-images - need more geometries!? #10 Liza Guest   Posts: n/a I was thinking that it might be possible in cfx pre? Or doing something with junction box routines and write new intermediate meshes?

 August 11, 2008, 18:04 Re: FSI using CT-images - need more geometries!? #11 brunoc Guest   Posts: n/a No, Pre won't interpolate geometries. You can probably do it with the meshing API. It is still done outside CFX, though.

 August 12, 2008, 09:33 Re: FSI using CT-images - need more geometries!? #12 Liza Guest   Posts: n/a Ok, I'll give it a try. Thanks for your help.

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