force to move foam

[themaxxer]

I need to push the foam in a direction on a certain frame... http://c2n.me/3FI7MSn.png
I thought about to use a plain force, but it pushes the liquid too, that's not so good in this situation...
what does the option "apply force from behind" mean? does it suck then instead of push?

thanks for helping.

best regards
themaxxer

[georgi.zhekov]

In the Plain Force in the box where it says Affect - delete all the things you don't need and add Foam.

Apply force behind will push the fluid behind the icon in the viewport. If it's off it will push only the things that are in front of the Force icon.

[themaxxer]

thanks for clarification. the tip with the affect is magical. very useful.

[themaxxer]

I was full of hope, but this workflow doesn't work... I have deleted everything in the "affect" field, and wrote "foam" but the foam doesn't' move...
http://c2n.me/3FPtfC2

should this work with the official build or with a nightly?

best regards
themaxxer

[Svetlin.Nikolov]

Hey,

This one is a bit tricky indeed - the foam underwater will not be affected by the force because it strictly follows the liquid movement. The foam above water will be affected by the force, but you might need to reduce the B2B interaction and the Surface Lock of the foam - these two options will try to oppose the force. The B2B interaction will try to keep the bubbles packed together, and the Surface Lock will try to keep the bubbles attached to the liquid surface.

Check these options and see if this makes it better.

Cheers!