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Showing results 1 to 9 of 9 Search took 0.00 seconds. Search: Posts Made By: taedeneo

Forum: CFX March 10, 2010, 21:55

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo By the way, why does it work in v12. not v11.? What did they change?? anyone?

Forum: CFX March 10, 2010, 21:50

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo I just found out that it works on CFX12 (before I used CFX11). So it 's all good now. but I still have doubt in my mind about how the coefficient works and helps the instability. I got the document...

Forum: CFX March 8, 2010, 21:44

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo the reason why i said that it is necessary to use double precision is that the bulk modulus is very big. This means that even a very small change in volume can make a big different in pressure. So if...

Forum: CFX February 28, 2010, 00:36

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo I forgot one thing. If you want to try to run it, double precision should be turned on since the bulk modulus is a very big number

Forum: CFX February 28, 2010, 00:20

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo links below are the file I use for the simulation (I think this way it will be more clear about what i did). I simplified the the problem to fluid in enclosure with a solid surround it. I tried...

Forum: CFX February 25, 2010, 08:27

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo It is hydraulic engine mount system. I am trying to simulate interaction between hydraulic oil and rubber parts of the mount. The fluid is modeled as slightly compressible with bulk modulus of 2e9...

Forum: CFX February 24, 2010, 09:53

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo Hi Stumpy, Thanks a bunch for the information. It is working now with a few of my test cases(all incompressible flow). what i did wrong is that i put the source in the whole domain instead of the...

Forum: CFX February 22, 2010, 10:52

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo Hi Stumpy, Yes, in some cases, it is possible to use relaxation factors equal to 1 and get convergence. From my experience, in many cases, when we try to solve flexible structure (high density...

Forum: CFX February 21, 2010, 09:24

Replies: 35 FSI and size of time-step Views: 12,751 Posted By taedeneo taedeneo Hi all, just wanna add one thing. Ansys-cfx uses fixed-point approach of doing FSI, therefore, one have to use small enough relaxation factors in order to make it "strongly coupled". However, it is...

Showing results 1 to 9 of 9

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