I have a 3d model in Autocad and I need to carry out a CFD analysis of the whole model. I am not sure how i can import that model into GAMBIT . i.e which kind of file....and how to...etc. Thanks, Taher

hi, Taher

the dwg or dfx can not be imported into the gambit.maybe you can use some modeling tool just like pro/e to convert it into igs format

regards

Thanks I will try to that.

Export your model as an ACIS file (*.sat file extension) from AutoCAD. You will have to turn your geometry into solids to export it. When you export to *.sat, you have to select the solid geometry in your model explicitly. In 2-D you use the "region" command to form your geometry.

In the past, I have successfully used AutoCAD to create geometry for Gambit in 2 and 3-D.

Me too. Also note the procedure: 1. Export autocad file as an ACIS 2. If created on a PC you need to convert format by command: to_unix filename 3. Open up gambit and import file as an ACIS. 4. Clean up geometry, you may find that volumes overlap, you have lines on lines etc, but for a complicated geometry its better than starting from scratch.

autocad is a very good drawing tools but not a good model tools

Thanks for all your help guys. I have finally managed to get the file in Gambit....I am now facing problems cleaning up...can you suggest me the correct procedure for cleaning up the geometry.

Hi Gavin, Thanks for your help...I have got the geometry in Gambit but am facing problems with cleaning up now.As you said ....there are lines over lapping ...but there are no volumes I have to create volumes...can you suggest me the correct procedure that I should follow for cleaning up

Firsly export your cad drawing as solinds and not lines. This should help. You can then set tolerances so that lines very close together become the same line (see the gambit tutorial involving the Sedan cad geometry, it should explain everything). It takes patience, and dependes on the quality of the cad drawing in the first place. But i recommend you read thye tutorial I mentioned above, it explains most of what you need to know.

Hi Gavin, Thanks for your help....I read the tutorial you mentioned and am working from there. Thanks. Taher

Dear sir I have a problem with this title. If it's possible for you please send me your received responses. Very thanks for your attention to my request. With the best regards. Mahdi saniee nezhad

Hi , You should be able to read all the responses on the website itself as following threads to that title. Let me know if you cannot.

[abdulameerh]

Originally Posted by Taher
;103295

Thanks for all your help guys. I have finally managed to get the file in Gambit....I am now facing problems cleaning up...can you suggest me the correct procedure for cleaning up the geometry.

dear
I read all massage that it was sending for you , but I do not understand it , and I have 3d geometry diffuser that I made it in autocad2000,2001,..., 2011 and I want to import it in gambit2.2.3 ,so I request from you to explain me in steps how I could do this ,I have acis and iges.

Thank you very much