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August 18, 2012, 07:56 |
Simulating a separation bubble on a blade
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#1 |
New Member
Jason
Join Date: Aug 2011
Posts: 10
Rep Power: 14 |
Hello,
I am simulating a blade with Re=210,000 and a turbulence about 2%. According to experimental data, a separation bubble should occur at about half of the blade chord but in my simulation I only get a big separation. I am using SST for turbulence and my y+ is less than 1 (except for the leading edge). I already run a many simulation on that case, but I don't even come close to a separation bubble. Do you have any suggestions what could influence the bubble? Thanks a lot. Regards Jason PS: I'm not very experienced in CFD yet. |
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August 19, 2012, 19:17 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Is the separation you are looking for a laminar separation bubble? You will need the turbulence transition model to capture this.
In the Re range you quote it is quite possible it is a laminar separation bubble. |
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