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May 15, 2015, 05:25 |
methods to initialize DNS turbulence field
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#1 |
New Member
Song
Join Date: Nov 2011
Posts: 12
Rep Power: 15 |
Is there any other methods to initialize turbulence field for DNS channel flow case, besides PerturbU?
I have tried perturbU, but the results are not satisfied. The "Streaks" did not evolve into turbulence, and they died out. It seems parameters of perturbU are too hard to tune... So, except this way I have to try something else... Could anybody give me some suggestions? Thank you |
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May 17, 2015, 08:20 |
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#2 |
New Member
Song
Join Date: Nov 2011
Posts: 12
Rep Power: 15 |
Oh, I got it :)
My experience that perturbU did not work well was due to the choice of SGS model. The oneEqEddy SGS model does not make perturbU work well, as I tried many days before, but the lowReEqEddy does! |
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November 12, 2020, 11:56 |
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#3 | |
Member
Join Date: Jan 2017
Posts: 71
Rep Power: 9 |
Quote:
Have you set up the case for channel flow with PerturbU file? |
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Tags |
dns, initial condition, les, turbulence, turbulence generation |
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