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April 17, 2012, 23:54 |
VOF Damping
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#1 |
Senior Member
KHB
Join Date: Aug 2010
Location: Singapore
Posts: 118
Rep Power: 15 |
Hi, I am wondering about how to use damping in free surface flow.
I am simulating a towing tank test of a planing type hull of length ~1m I put my boundary 2L upstream, 6L downstream, 3L on the transverse direction. I am running calm water condition, and would like to know what is the significant of wave damping, and in Star-CCM+ is there any guidelines on how do we 'select' the appropriate wave damping length? Thanks |
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April 18, 2012, 10:33 |
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#2 |
Member
Ryan Coe
Join Date: Jun 2010
Location: Albuquerque, NM
Posts: 98
Rep Power: 15 |
Are you asking about boundary conditions used to damp wave reflections?
__________________
Ryan |
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April 18, 2012, 11:11 |
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#3 |
Senior Member
KHB
Join Date: Aug 2010
Location: Singapore
Posts: 118
Rep Power: 15 |
No, I am want to know how far should we apply the damping from the field of interest, and also how do we decide the VOF wave damping length
And also does damping is also important if we are running Flat Wave model? |
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June 14, 2013, 09:23 |
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#4 |
Member
Arun Krishnan.L.H
Join Date: Jan 2013
Posts: 75
Rep Power: 13 |
Hi,
I also have a question regarding wave damping. Is there a way to increase the damping coefficient? Looks like I have some wave reflection happening. I saw the manual says it damps the w velocity. Should my vertical then be in z direction? My vertical is y axis. Just wanted to make sure. need guidance if you know Regards Arun |
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December 1, 2014, 10:57 |
What CD-Adaco says
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#5 |
New Member
Higuel
Join Date: Nov 2014
Posts: 1
Rep Power: 0 |
Hello all,
I have the same difficulty in selecting the wave damping length for my resistance simulations. It is said in the Steve Portal Article Number 5216, that "the VofDampingLength to be at least of the order of the ship length". However, the EHP resistance assistant makes this length twice the ship length. I have never had the opportunity to compare the results by using L or 2L. Does anyone? Cheers, Higuel |
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December 1, 2014, 20:16 |
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#6 |
Senior Member
KHB
Join Date: Aug 2010
Location: Singapore
Posts: 118
Rep Power: 15 |
Yes, twice the ship length is still in order of the ship length ()
You can try to compare I suggest and see the difference.. |
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