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rlguy / Blender-FLIP-Fluids

The FLIP Fluids addon is a tool that helps you set up, run, and render high quality liquid fluid effects all within Blender, the free and open source 3D creation suite.
https://www.blendermarket.com/products/flipfluids
GNU General Public License v3.0
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Outflow can't keep up with inflow? #580

Closed baronlanteigne closed 2 years ago

baronlanteigne commented 2 years ago

I'm not sure where to ask and I've been digging in the documentation but I can't find what I'm looking for.

This is what I got:

https://user-images.githubusercontent.com/10411890/165962856-c62ca74e-fb93-42c8-a9fe-dd1d44fb177c.mp4

I'm trying to "slow down" the inflow so the box don't fill so quickly and at the same time, I want the outflow to get rid of the fluid faster. I am not sure which parameters can affect that. Previously, I've been using the volume force with animated mesh and I really like that approach but this time I would like a constant flow.

Thanks.

Edit: So I had colliders to create some splash, this is was affecting the outflow. I have to make sure the collider are smaller and don't block the flow at all.

I'm experimenting with a lower gravity and initial velocity hoping that the fluid moving slowly makes it so there is less fluid generated?

I'm wondering how World Scale can impact this. Also a lower Particle Scale could help?

I'm testing all this and might delete or rewrite this post depending on where it leads me.

rlguy commented 2 years ago

Thanks for the report! Let me know if you find any more information on the issue. If you're able to attach a file that reproduces the issue (or send to support@flipfluids.com), I'd be glad to take a look for any problems.

Something to try would be to lower the floor of the domain to create a larger outflow. If the liquid is moving quickly, it can hit the bottom of the domain and bounce/splash back up before the outflow gets a chance to remove the liquid.

I'm experimenting with a lower gravity and initial velocity hoping that the fluid moving slowly makes it so there is less fluid generated?

The Inflow Constrain Fluid Velocity option can be useful for slowing down the emission of liquid.

I'm wondering how World Scale can impact this. Also a lower Particle Scale could help?

World scale will affect the speed of the liquid (smaller scale -> liquid travels more distance per frame), so a side effect of smaller scale could cause this. Particle scale only affects the mesh generation process and should not affect the motion of the liquid physics.

rlguy commented 2 years ago

Hi, just closing this issue due to inactivity. If this issue still persists, feel free to update or send a message to support@flipfluids.com and I can re-open the issue.