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louisgag April 24, 2009 19:33

GGI Vorticity
Hi Foamers,

I'm using the latest svn with a GGI interface and I noticed that when I run the vorticity tool on the case and then visualize in paraFoam, the vorticty at the interface is really weird (high values all along the interface), for almost all my runs.. However, the flow field around the interface is fine in terms of pressure, velocity, and vorticty... Could that be an issue with the vorticity tool when used with GGI?

Thanks for your feedback,


yuhai April 26, 2009 15:57

hallo, louisgag
according to me, GGI is already much better on this than Sliding Interface.
while in Sliding Interface, I always observe this problem.
How many faces have you used on the interface? and deltaT is how much?


louisgag April 26, 2009 16:41

Hi Yuhai,

I used 200 faces on my interface (it is 2D) and the resolution is similar to my boundary layer resolution. As for deltaT, i let it vary with a max courant number of 0.5. (So, deltaT is roughly 1e-05

ty for the feedback,


rieuk May 31, 2010 05:44

I also had a similar problem with the solution at the interface. I had a spatial discontinuity though, no spikes or anything. It looked as if the solution on the outside (static part of the mesh) was lagging (in time) slightly compared to the inside.

Anyone else notice this?

louisgag June 8, 2010 14:10

Hi James.

I did have a similar problem at times; however, I did not investigate on the cause.

Best regards,


A.Devesa July 13, 2010 08:46

i guess this could be related to this one:

i hope this helps!

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