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September 24, 2010, 05:22 |
Pressure outlet backflow
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#1 |
New Member
Join Date: Sep 2010
Posts: 10
Rep Power: 15 |
Hi there, my first post, been reading this forum for quite a while now..
I ran through the DFBI tutorial, all went ok. Now I want to do the same with my own hull, Hull created in Catia, very similar to the dfbi one, exported in Catia as iges, I then import it in star ccm+ (v4.04), and split my body by patch to get all my boudaries separated, in the end it all looks like the dfbi tutorial, now I do the meshing, surface and volume all look ok, probably will need a bit more work in some interest areas but for now will do. I set all the rest as in the dfbi tutorial (except I use flat wave) and when I run the simulation I get this kind of message : "reversed flow on faces limited in xxxx cells in region Outlet" for every inner step, If I let it run I can see the flow around my body is as expected but at the outlet it looks like I have a backflow creeping in, forming like a wave, eventually the whole domain fills up... Now what am I doing wrong ? I thought maybe my outlet face is reversed ? is that even possible ? How can I check it and correct it ? Thanks all ! |
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