Water that doesn't fill

[fingerindustries]

Hello,

I'm making a flushing toilet, and after some experimentation I'm using 1 simulator with an initial fill up for the U-bend, and some emitters around the rim to pour water in during the flush.

The problem is when the toilet starts flushing, the toilet fills (as expected!). Is there any way I can have the water that falls in to the initial fill NOT add to the amount? I just really want it to create the waves and noise but keep the water level approximately the same.

Any ideas are much appreciated.

[Ivaylo Katev]

if you use the "initial fill up" option with an official build there is a wall to support the water, and if you outgoing pipe is under the water level its output is jammed. there are several options
-try to use negative source placed on the outgoing pipe
- create part of the outgoing pipe to be above the water level, the boundaries are open and the water can leave the simulator there.
- ask for nightly build access, the underwater supporting walls were replaced by pressure in order to simulate ocean/sea scenes and the water level does not rise when you pour the simulator, like the real ocean.

[shawkins]

I'm following along with this thread, but am a little confused. I'm using "initial fill up" and my drainpipe would be underwater. I'm wondering why part of the outgoing pipe should be above the water level. I've also created a gravity space warp and connected it to my drainpipe that is underwater, but I'm not having any success having the water drain. Sorry if this is too elementary, just trying to understand is all. This is exactly the effect I'm trying to achieve.

Thanks

[Ivaylo Katev]

just ask for nightly access and the under water pipe will be not a problem.
you don't need space warp, there is a default gravity.

[shawkins]

I think I already have nightly access because I am using Phoenix FD for Vray 3.0. Is this what you mean? Should I just download/install the latest Phoenix nightly build?

[shawkins]

Ivaylo,
I installed the latest build from today. Could you tell me where I would find the default gravity in Phoenix?

[shawkins]

Sorry, to clarify, could you tell me how to apply the default gravity to my drain pipe geometry. I'm assuming I include my drainpipe under the "interaction" tab, correct?

[Ivaylo Katev]

the gravity is by default enabled, but i suppose you are trying to use the gravity to make the pull in the pipe? if this is what you need, do not use gravity, use a source with negative discharge

[shawkins]

I'll give that a try. Thank you for your help.

[shawkins]

I tried using a thick tube where the drain end is within the boundaries of my FD simulator and underwater and the other end going straight down and outside of the boundary. I have an initial fill of about 40 and a gravity plane going straight down. I'm not getting any liquid exiting the tube. I've tried both including and excluding the tube from the FD simulator, but with no luck. Any thoughts?

[Ivaylo Katev]

can you show us a preview movie?

[Ivaylo Katev]

ok, i made a fast test, the gravity can't do the work, because the real toilet have long vertical pipe behind it that works as powerful vacuum pump.
i replaced it with a negative source, the scene is attached
i'm not using the initial fill up option, because it produces water outside the toilet, i'm using brush technique fill up

[shawkins]

Very nice. I'm going to dissect your scene. Thank you so much for your help.