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cicagol September 22, 2009 06:41

Vof Wave
 
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

cicagol September 23, 2009 08:54

1 Attachment(s)
It's the first part of summary report

cicagol September 23, 2009 08:58

1 Attachment(s)
the second part

cicagol September 23, 2009 08:58

1 Attachment(s)
the third part

Maddin September 24, 2009 11:25

Quote:

Originally Posted by cicagol (Post 230115)
Do you have an idea to solve this problem?

Maybe I translated your text wrong but what's your problem? :D
That the wave becomes flat quickly?

cicagol September 24, 2009 11:36

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

Maddin September 24, 2009 11:38

Why only first order?

cicagol September 24, 2009 11:42

Not only first order...but i'm studying first order...with first order I mean first order of Stokes approssimation theory

Maddin September 24, 2009 11:50

Ahh ok. That's down my alley :D
Maybe this helps you:
http://www.flow3d.com/resources/news...mmer09_02.html

cicagol September 24, 2009 11:53

Thank You, I've already seen this yesterday...it's the reason i wrote that first order have some limits

Maddin September 24, 2009 12:18

Ok, then I understand your posting right.
Again what is your problem?

cicagol September 24, 2009 12:21

In this moment nothing, i'm simulating a new wave and tomorrow i'll see the result...So i'm waiting...

cicagol September 28, 2009 03:13

After three days of simulation, 64 sec. in simulation time...it's all good

Maddin September 28, 2009 04:29

Sounds good. :)


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