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-   -   Question about CFX GGI critical situation (http://www.cfd-online.com/Forums/cfx/117594-question-about-cfx-ggi-critical-situation.html)

Anna Tian May 11, 2013 11:36

Question about CFX GGI critical situation
 
Hi,

If the fluid domain grids surface A need to have GGI connection to two different grids surfaces B and C (one solid and one fluid). But because of the geometry complexity, the A surface can't be split into two, so the connections with B and C can't be defined separately. But if we define GGI like A with B then A with C, we got the error message

'In Analysis 'Flow Analysis 1' - Domain Interface 'A': The location is already being used for another boundary or interface.'

.

How to deal with this critical situation?

ghorrocks May 12, 2013 08:16

You will have to split surface A, even if it is difficult. As you correctly point out, surface A cannot be shared on two GGIs.

RicochetJ May 12, 2013 10:41

Surely it's easy to do this if you're using ICEM and some drawing package for your geometry.

1. In your drawing package make sure surface A is split in two.
2. Import the geometry into ICEM.
3. Create two separate parts in ICEM for the surface A.
4. Export your ICEM mesh to CFX.


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