something ghostly divides my fluid into weird parts!

Support Particles and Physics Simulations
1

Please see the screenshot below, my fluid object doesnt have any separations its just one piece solid rectangle cube which should be going down in one piece, but when I bake the fluid object, the fluid animation divides into 4 parts. Wierd! Can you please help me what’s wrong here?

untitled.blend.png824×780 236 KB

2

Can you please help me what’s wrong here?
Can you please supply a link to your blend file ?

Don’t try and make it as difficult as possible for anyone to help you.

3

thanks for your reply. and sorry if I made it complicated to explain, here is the link the draft file I m working on https://www.sendspace.com/file/qqkakz

i made some changes whilst trying to figure out the problem, I don’t know what causing this layered obstacle looking thing on my fluid.

4

A few issues/things:

  • you have two fluid objects (alt-H to unhide), one could be enough, also one of them is partially outside the domain, which isn’t good,
  • the biggest killer is your obstacle (the huge cube at the bottom of the sim), simply removing it from your sim fixes your issue, it isn’t doing much, the fluid being limited by the domain.
5

thank you , alt-H was very helpful… and also you were right the big cube as floor as obstalce wasnt a good idea, all seems fine now… so basically all fluid domain related objects ( obstacles or fluid ) should be in the domain, not bit of them extending outside, right?

6

Yes, the domain limits where the fluid is simulated, so it is useless to have anything outside of it.

7

can i just ask somethingelse, still related fluid simulation tho… lets say I have a chair in the scene and I want it to hit by the wave of the water and carry away by the force of the fluid, how should i do it? I can make chair as an obstacle but it wont move when hit by fluid :frowning:

8

can i just ask somethingelse, still related fluid simulation tho… lets say I have a chair in the scene and I want it to hit by the wave of the water and carry away by the force of the fluid, how should i do it? I can make chair as an obstacle but it wont move when hit by fluid :frowning:
The fluid mesh exerts no forces on objects, therefore you do what 3d animation is all about, fake it.

You can manually keyframe its movement or use rigid body simulation and a forcefield to simulate its movement in time with the fluid simulation.