Flip Fluid vorticity

[JuriBryan]

Hi, I am trying to create a rendering surface geometry for my flip simulations.

For that all I had to do in older versions of houdini was to lay down a isosurface sop with $V as function and I would get only the top surface plane of the sim.

But this seams to simply not work anymore.

The node feeds out nothing... all I can get is a single primitive... no mesh what so ever no matter how high the resolution.

Any idea how to extract only the top plane in later versions of houdini?

Cheers,

Juri

[Skybar]

You mean the top surface of a meshed FLIP sim? I don't know, I'm having troubles with it as well. Currently I'm using a Delete SOP with bounding box to delete the sides, and a Ray SOP (I ray the mesh against itself) to get rid of the "floor". I'm not at Houdini right now so I don't quite remember, but it might be better to use one before the other. Only the Ray SOP takes you quite far actually, but I've had troubles with the sides, so I use the Delete too.

However this seems quite excessive and there are some problems with it. If someone knows a better way it would be great.

[Annon]

That's not vorticity. Vorticity is the angular change of the velocity.

http://en.wikipedia.org/wiki/Vorticity

[JuriBryan]

sorry... the browser auto filled in vorticity... topic should be called flip fluid rendering surface....

I also don't see a option to change the name of a topic, so again sorry about that.

But the question still stands, what is the best way to only mesh the top surface plane of a flip sim in H12.5

-Juri