Beer foam behavior and shape

[ominetpl]

I'm creating a simulation of pouring beer into a Snifter type of glass.

My problem is in the size and variations of the foam bubbles and behavior of foam during pouring.
In my simulation the foam looks like more "sticky" to liquid, rather than more stable form. Also the size of the bubbles is too big and lack of variation.

My goal is to achieve something like that - http://i.dailymail.co.uk/i/pix/2015/...0732803754.jpg (dense, stable form), but my renders looks like in uploaded render

I post screens of my settings of Phoenix Liquid and Foam

Thanks in advance in help

[georgi.zhekov]

Hello,

First of all - make sure to grab a latest nightly build. You can find how to do that here - https://forums.chaosgroup.com/forum/...nightly-builds

After that - your grid resolution seems quite low. Try to increase it a few times.

Your scene is in relatively real scale, but sometimes this doesn't produce the desired artistic result - you can increase your Scene scale a few times which will help the liquid and foam movement look more stable.
Another thing you can do is to play around with the b2b interaction - increasing it will make the bubbles stick better to each other and have this beery feel.

As for the Foam variation you can take a look at our doc page - https://docs.chaosgroup.com/display/PHX3MAX/Liquid+Foam There you can find examples of how most of the settings will impact the final look of your foam.

[ominetpl]

I made some tweaks - change the grid res, scene scale, time scale.

From that time, the fluid looks good, but, the foam particles start bouncing on the top of the foam layer.

Any ideas how to calm down that bouncing freaks?

[George Barzinski]

I think there could be two reasons for that: B2B interaction and the bubbles' size. Gotta find the perfect balance between them. What I mean is that if you have very small bubbles the foam would be unstable and won't hold its shape and if the bubbles are too large they would start to pop out because of the b2b interaction which tries to keep them tightly. How to know which bubble size is correct? Well, for this kind of stable foam it should be smaller than the grid cell size (in your case somewhere around 0.025 - 0.035cm).