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Old   September 22, 2009, 06:41
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Andrea Cicalini
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I'm doing a thesis about 6 Dof body (an Hull) and waves of first order with STAR CCM+ v4.04.The wave diffuses quickly and become a flat wave in the control field. I put the boundaries of velocity inlet in every external face of dominio except for the face behind the hull where i put pressure outlet.I set a timestep of 0.01 sec. The wave has a lenght of 20 m, amplitude 1 m,current and wind 2,5 m/s. Do you have an idea to solve this problem? Thank You

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Old   September 23, 2009, 08:54
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It's the first part of summary report
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File Type: pdf Summary Report 1.pdf (75.7 KB, 101 views)
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Old   September 23, 2009, 08:58
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the second part
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Old   September 23, 2009, 08:58
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the third part
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File Type: pdf Summary Report 3.pdf (78.7 KB, 38 views)
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Old   September 24, 2009, 11:25
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Quote:
Originally Posted by cicagol View Post
Do you have an idea to solve this problem?
Maybe I translated your text wrong but what's your problem?
That the wave becomes flat quickly?
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Old   September 24, 2009, 11:36
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Yes...I think it's a problem of approssimation...a first order wave has limits and i can't have a wave of certain features with the first order
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Old   September 24, 2009, 11:38
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Why only first order?
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Old   September 24, 2009, 11:42
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Not only first order...but i'm studying first order...with first order I mean first order of Stokes approssimation theory
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Old   September 24, 2009, 11:50
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Ahh ok. That's down my alley
Maybe this helps you:
http://www.flow3d.com/resources/news...mmer09_02.html
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Old   September 24, 2009, 11:53
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Thank You, I've already seen this yesterday...it's the reason i wrote that first order have some limits
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Old   September 24, 2009, 12:18
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Ok, then I understand your posting right.
Again what is your problem?
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Old   September 24, 2009, 12:21
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In this moment nothing, i'm simulating a new wave and tomorrow i'll see the result...So i'm waiting...
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Old   September 28, 2009, 03:13
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After three days of simulation, 64 sec. in simulation time...it's all good
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Old   September 28, 2009, 04:29
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Sounds good.
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