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Y+ effect on k-omega model to analyze sloshing phenomenon in a tank

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Old   September 14, 2022, 02:48
Exclamation Y+ effect on k-omega model to analyze sloshing phenomenon in a tank
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I have simulated a tank subjected to harmonic excitation. I have used different turbulence model to simulate the same problem and validated the results with experimental data. The literature shows that SST k-omega gives false results when y+ increases beyond 8. But in my case y+ ranges from 0 to 100. A used Kato-limiters, intermittency transition flows and curvature correction in the model. The percentage difference in experimental and theoretical results is 2%.
I just want to make sure that the theory of k-omega also validate these results.
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Old   January 16, 2024, 01:52
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Quote:
Originally Posted by khabdullah View Post
I have simulated a tank subjected to harmonic excitation. I have used different turbulence model to simulate the same problem and validated the results with experimental data. The literature shows that SST k-omega gives false results when y+ increases beyond 8. But in my case y+ ranges from 0 to 100. A used Kato-limiters, intermittency transition flows and curvature correction in the model. The percentage difference in experimental and theoretical results is 2%.
I just want to make sure that the theory of k-omega also validate these results.
I am a beginner of FLOW 3D. I have a technical question. How did you apply the harmonic excitation in FLOW 3D. I want to simulate the sloshing behavior of cryogenic propellent in a tank. But I don't know how to apply an excitation. I would be very grateful if you tell me.
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Old   January 24, 2024, 11:00
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Originally Posted by SJTUMEzzq View Post
I am a beginner of FLOW 3D. I have a technical question. How did you apply the harmonic excitation in FLOW 3D. I want to simulate the sloshing behavior of cryogenic propellent in a tank. But I don't know how to apply an excitation. I would be very grateful if you tell me.
Hi, you can define the sinusoidal frame motion using UDF. You can get information about User Defined Function in Flow 3D user manuals.
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internal baffle, k-omega sst model, sloshing, turbulence analysis, turbulence intermittency

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