Soft Body falling in whipped cream

Discussions about the use of Realflow
matissb
Posts: 4
Joined: Sat Nov 18, 2017 3:16 pm

Soft Body falling in whipped cream

Postby matissb » Mon Nov 27, 2017 6:29 pm

Hi Everyone,
I'm working on a simulation and have some questions about soft body/liquid interaction.

In my simulation a soft body (half of a donut) falls into shot. After that a high viscosity whipped cream is pressed onto the donut - untill this point everything works fine. After that, the other half of the donut (also soft body) falls on the whipped cream.

Soft body interaction works fine - the donut starts bending when touching the whipped cream, however, whipped cream doesn't "squeeze out" - instead, it starts losing particles at the point where the falling top touches it.

Here are some screenshots from my scene: https://imgur.com/a/A9WtW
Anyone has some ideas how to make the falling top part interact with the whipped cream and retain the number of particles, instead of disappearing on contact?

Thanks, Matiss


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tsn
Posts: 915
Joined: Fri Oct 27, 2006 10:36 am

Re: Soft Body falling in whipped cream

Postby tsn » Tue Nov 28, 2017 9:39 am

Hi Matiss,

I see a k Speed daemon in your scene and it's connected to the emitter. I can only guess, but maybe the reason is that the particles are being accelerated when they're hit by the second donut? When the particles' velocities exceed the k Speed daemon's "Max speed" they'll be removed. If you want to limit their speed without losing them then activate the "Limit & Keep" option. Otherwise you can also disable the daemon.

It could also be a stability problem and in this case you should increase minimum and maximum substeps in the simulation options: http://bit.ly/2nbT9rZ

matissb
Posts: 4
Joined: Sat Nov 18, 2017 3:16 pm

Re: Soft Body falling in whipped cream

Postby matissb » Tue Nov 28, 2017 11:43 am

Yes, thank you so much, a tick in "Limit & Keep" of the k_Speed makes all the difference, everything seems to be working perfect right now!
Thanks, Matiss


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