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#1 |
New Member
Join Date: May 2013
Posts: 9
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Hi all
In fluent theory guide, one can find that: "In the DDES and IDDES implementations [of DES k-w], fd is used as defined for the Spalart-Allmaras model with the exception that the value of the constant is changed from 8 to 20." But it is not clear how the model switch between RANS and LES approach. My opinion is that in the equation Fdes = max{ [Lt/(Cdes*Delta)]*(1-Fsst) ; 1} this fd is just Fsst, but I am not sure, neither I can find any papers that explain that. Am I wrong? |
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#2 |
New Member
Join Date: May 2013
Posts: 9
Rep Power: 13 ![]() |
Ok, I will answer to my own question.
To whom that could be interested, you can find how actually fluent uses the Spalart fd limiter giving a look to this paper: M. S. Gritskevich et al., “Development of DDES and IDDES formulations for the k - ω shear stress transport model,” Flow, Turbul. Combust. 88, 431 (2012) |
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ddes fluent sst shielding |
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