Foam stops moving

[cashflow]

Hi All,

Im fairly new to phoenix sim's and I have run into a wierd problem with a liquid sim. Foam / bubbles are generated by a whale jumping out of the water but then seems to just stop moving after a few frames, so when the liquid drops down the foam stays in place. \
Looks pretty cool but its not what im going for :] Are there any settings that control this behavior ?

I'm on build 3.04.00

[Svetlin.Nikolov]

Hey,

Check the Foam's Falling Speed parameter

Cheers!

[cashflow]

Thanks for the quick reply. I thought that might have something to do with it so I turned it way up for my last sim ( to like a 100) , that didnt seem to fix the problem. Maybe I should try a more normal setting :]

[cashflow]

I ran a quick re-simulation for a couple of frames but the particles still dont really seem to move.
I've attached a screenshot where you can see the particles just chilling out in the air. And the settings I've used for this, anything wierd in there maybe ?
Will try to do another re-sim with a higher value for the falling speed.

[Svetlin.Nikolov]

Hmm, your Scene Scale is in the Dynamics rollout, so it seems like you are using an old Phoenix - is there any difference with 3.05? Also, what is the size of the simulator in world units (you can check it in the Simulation rollout)?

Cheers!

[cashflow]

Thanks for your help, The last Sim I ran looks a lot better and the foam is dropping faster, falling speed is now at 25.0m. Damn I missed 3.05 - I will update our shabby farm after this project :]

On a sidenote : The container dimensions are 73.8 x 48.4 x 27.54m. I guess together with the scene scale of 3 this might be a bit too much ? Is this what is causing The fluid to behave somewhat sluggish? It works for the sort of epic slowmo-ish shot Im going for but it would be good to know for future projects.

[Svetlin.Nikolov]

Oh yes, the dimensions are multiplied by the scale for the effect Phoenix sees - in 3.05 you can see the real world dimensions in the Simulation rollout and the dimensions adjusted by the Scene Scale param in the Grid rollout too

[georgi.zhekov]

Hey,

You can check how the scene scale behaves with different values - https://docs.chaosgroup.com/display/PHX3MAX/Liquid+Grid

Lower scene scale will make the fluids move faster while large scale will make them move slower.