Reduce the trim oscillation

armanss · December 31, 2015, 11:30

hi,
I'm working on a numerical simulation of a vessel in flat wave with DFBI morphing motion. but in high speed the trim behavior go to oscillation and the vessel does not get the certain trim.
which one of the meshes caused a shortage oscillation?
or what parameter affect on reduce the trim oscillation?

efe011 · January 7, 2016, 13:28

It might be a physical phenomenon instead of a numerical issue. Try looking for "porpoising".

Regards.

lava12005 · January 11, 2016, 03:38

You can try overset or DFBI of the whole domain?
Porpoising also a possible phenomenon as efe011 said..

December 31, 2015, 11:30	Reduce the trim oscillation	#1
armanss New Member Arman Join Date: Oct 2014 Location: iran Posts: 6 Rep Power: 12	hi, I'm working on a numerical simulation of a vessel in flat wave with DFBI morphing motion. but in high speed the trim behavior go to oscillation and the vessel does not get the certain trim. which one of the meshes caused a shortage oscillation? or what parameter affect on reduce the trim oscillation?

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January 7, 2016, 13:28		#2
efe011 New Member Join Date: Oct 2012 Posts: 9 Rep Power: 14	It might be a physical phenomenon instead of a numerical issue. Try looking for "porpoising". Regards.

January 11, 2016, 03:38		#3
lava12005 Senior Member KHB Join Date: Aug 2010 Location: Singapore Posts: 118 Rep Power: 16	You can try overset or DFBI of the whole domain? Porpoising also a possible phenomenon as efe011 said..