More head on a beer?

[Raven]

I have a simulation that the client is very happy with, but they just wants more head on the top of the beer.

What would be the best way to achieve this?
- completely redo the sim with more foam and more B2B, will the fluid still behave in the same way? Does more foam influence the fluids movemet?
- or use resimulate, not 100% how that works, do I just enable particle resimulation and change the out put path? Then setup foam as I would a new sim?

Thanks
Gavin

[ivaylo.ivanov]

Changing the foam parameters will not change the liquid simulation. You can use resimulation also, but you will not save much sim time in this particular case probably since most of it is going for the B2B interaction.

[Raven]

Thanks that's good to know.
I noticed that on the beer example the foam size is quite large to achieve the head. We however do not want large bubbles in our foam.
Do you have a recommended setting.
At the moment our foam is 0.02cm and B2B 4000. This gives us about 0.75 - 1 cm of head. we need at least double that. If we just double the B2B will that do it.

Thanks

[Ivaylo Katev]

0.02 sm is too small, actually you will be unable to see the bubbles with naked eye. wrong point position perhaps?
increasing b2b helps until all the bubbles are not penetrating in each other, that i suppose is almost satisfied with b2b 4000.
so, i would recommend to increase the birth rate, double it and you will have doubled head.
of course the easiest way is to increase the bubble size. note that changing the size with only 25% in size doubles the volume of the foam.

[Raven]

Thanks Ivaylo

I will give that a try.