Emptying a filled object

[denx]

Hi,

I need to simulate the emptying of an object through a hole in the floor, after a plug is pulled.

Is there a way to use an object which is already filled with liquid? Or do I have to fill it first?

Thanks in advance

[Svetlin.Nikolov]

Yup, depending on how your scene is setup, you can either fill your simulator to some level using the Liquids->Initial Fill Up option (it's 50% by default), or if you need to fill something with a more complex shape, you can use the PHXLiquid in Brush mode, and animate the discharge to 100% for a single frame and then back to 0 - this way you will imprint the geometry shape into the simulator in the form of liquid, you only have to exclude the emitter geometry from interacting with the simulator - with the official version 2.1.1 this happens from the Interaction rollout, or with a recent nightly build you can do it form the phoenix right-click menu of the geometry.
In either case you may need to wait several frames for the liquid to settle.

[denx]

Thank you!

I was still using 2.0... now it makes sense.

Since I have to empty an object, I'll try the PHX-Liquid-Method.

Or is it possible to fill an object with the Initial Fill Up option?

Once again: Thanks a lot! I'll try different things now...

[Ivaylo Katev]

Or is it possible to fill an object with the Initial Fill Up option?

unfortunately no, the initial fill up option fills the grid, not an object

[denx]

Thank you!

Last question: The "animate the discharge to 100% for a single frame and then back to 0" did the trick. But the discharged water doesn't interact with other objects. Nor with planes, nor with sliced geometry. So I cannot "fill" a box, because the liquid falls through the geometry...

[Ivaylo Katev]

use boxes instead planes, they are too thin. the liquid simulations need at least two cells thick objects