Weird representation of generated waves

stonescar · May 26, 2013, 02:10

Hi, I am trying to simulate a ship moving forward in head waves.
But when the simulation is done and I try to look at the free surface plot, there are some disturbances.
If you look at the picture you can clearly see alot of small waves, on top of the main waves that I am trying to create.
What can the reason for this be?

fuzel · June 21, 2013, 11:16

Hi stonescar,

my initial guess would be a combination of representation settings and mesh resolution.
Could you send/post a picture showing your mesh resolution in the free surface region? (your resolution in waveheight, wavelength)

Otherwise I d suggest double checking your wave settings. What order wave are you using? frequency wave height and check your initialization!

Cheers

Kons

fuzel · June 21, 2013, 11:19

ps.

did you have a look at a plot of the free surface along the domain?!

May 26, 2013, 02:10	Weird representation of generated waves	#1
stonescar New Member Join Date: Sep 2012 Posts: 3 Rep Power: 14	Hi, I am trying to simulate a ship moving forward in head waves. But when the simulation is done and I try to look at the free surface plot, there are some disturbances. If you look at the picture you can clearly see alot of small waves, on top of the main waves that I am trying to create. What can the reason for this be?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Crack/Explosion of a pressure chamber and the resulting shock waves	challenger	OpenFOAM Running, Solving & CFD	0	April 8, 2013 13:42
WAVES GENERATION IN A PORT OR BRAKE WAVES. important	tecnicaf1	STAR-CCM+	1	May 27, 2011 08:32
CFD Animations of breaking waves	Dommermuth	Main CFD Forum	0	June 17, 2009 12:47
CFD Animations of waves, ships, and turbulence----	Douglas Dommermuth	Main CFD Forum	23	January 8, 2008 13:41
Terrible Mistake In Fluid Dynamics History	Abhi	Main CFD Forum	12	July 8, 2002 10:11

June 21, 2013, 11:16		#2
fuzel New Member Kons Join Date: Apr 2012 Posts: 12 Rep Power: 14	Hi stonescar, my initial guess would be a combination of representation settings and mesh resolution. Could you send/post a picture showing your mesh resolution in the free surface region? (your resolution in waveheight, wavelength) Otherwise I d suggest double checking your wave settings. What order wave are you using? frequency wave height and check your initialization! Cheers Kons

June 21, 2013, 11:19		#3
fuzel New Member Kons Join Date: Apr 2012 Posts: 12 Rep Power: 14	ps. did you have a look at a plot of the free surface along the domain?!