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May 25, 2011, 10:54 |
Why DDES=RANS?
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#1 |
New Member
Aladdin
Join Date: Jan 2010
Posts: 26
Rep Power: 16 |
Hi everybody,
I meet a very strange problem . When i use my code to calculate a 2D naca0012 airfoil with DES, and i got the complex vortex systems. Using the same grid, when i simulated it by DDES, the result was same with RANS, who can give me some suggestion? THX |
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May 26, 2011, 01:02 |
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#2 | |
Senior Member
Raashid Baig
Join Date: Mar 2010
Location: Bangalore, India
Posts: 135
Rep Power: 16 |
Quote:
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May 26, 2011, 21:35 |
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#3 |
Senior Member
N/A
Join Date: Mar 2009
Posts: 189
Rep Power: 17 |
This is a big problem with DDES. It is very sensitive to the Initial condition and the grid you use. Spalart has mentioned this as a possible problem in DES. Try using IDDES or the other new versions of the model.
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