Turbulent Fluid Simulation

[oceaneering_international]

Hi,

We are trying to create a highly turbulent fluid flow movement inside a pipe that is getting affected by some valve movement.

Nozzle Check Valve Fluid Simulation on Vimeo

Currently, we are following an approach of using a Phoenix FD Turbulent helper object, which is giving us the desired turbulent movement for the fluid. But this is also causing the fluid to be a lot more bubbly and unpleasant from the interior. We are happy with the outer shape of turbulent fluid as we want the fluid to behave in such a way, but the inner jittery and bubbly behavior is something we would like to get rid of. Kindly have a look at the attached screenshots for more details.

Is there a setting that we need to take care of in the turbulent settings? Or should we take some other approach to get a turbulent fluid movement without the inner bubbles and roughness?

[georgi.zhekov]

Hey,

Looks like the roughness comes from the meshing. There are a few things you can try:

- use the pipe as a render cutter - in order to do that go the Rendering rollout of the Phoenix simulator and pick the pipe as Cutter geometry, then turn on the Invert cutter option - you can find more about the cutter options here - https://docs.chaosgroup.com/display/...quid+Rendering
- you can try to use Isosurface rendering mode in the Rendering rollout of the Phoenix simulator

Hope this helps!

[oceaneering_international]

Hi Georgi,

Thank you for your reply. As per your suggestion, I have tried both the options but without any success. I am attaching the screen-shot for your reference.

Regards

[georgi.zhekov]

Ah, but this time your grid resolution is way lower.

Try increasing the grid resolution and try increasing the steps per frame a bit, combined with the cutter options it should look better.