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Anyone had any luck making Jelly

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  • Anyone had any luck making Jelly

    Per the subject really. I have put viscosity up as high as possible - non-newtonian is 0.. tried sticky as 1, surface tension to 10 but when I have a cube falling into a little bowl it just detonates.

    Just trying to get the cube to fall and stay in place like jelly does and just have a bit of wobble.

    Any ideas if this is possible with phoenix.

  • #2
    Hey,

    The Viscosity strength is connected to the Scene Scale and the Steps Per Frame - in order to achieve "stronger" Viscosity, you should consider increasing the Scene Scale and the Steps Per Frame values. But be aware that the Scene Scale affects the fluid behavior and the Steps Per Frame are increasing the simulation time, so you should balance between them.

    It's important to mention that if you increase the Grid Resolution, the Viscosity will become "weaker", but you could keep the balance by adjusting the Scene Scale and the SPF values.

    Here you can find example videos and scenes, showing how the Sticky Liquid and Viscosity options work - https://docs.chaosgroup.com/display/...iquid+Dynamics


    Hope this helps!
    Last edited by slavina.nikolova; 25-04-2021, 11:39 PM.
    Slavina Nikolova
    QA Specialist, V-Ray for SketchUp | V-Ray for Rhino | Phoenix
    Chaos

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    • #3
      Thanks, I am actually on that page alot Good info about the scene scale and SPF though, I will have a muck around with that now.

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      • #4
        I also think the surface tension is waaay to high and maybe this blows the sim up - try with 0 surface tension and then gradually increase it if needed.
        Svetlin Nikolov, Ex Phoenix team lead

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        • #5
          The viscosity can make the liquid to behave almost as rigid body, but can't introduce elasticity, the physical property that produces the jelly behavior.So in the best case, your cube will preserve the shape when hit the floor, but will not wobble
          ______________________________________________
          VRScans developer

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          • #6
            yeh I have been trying to figure out how to get my wobble on but can't get to that point. Will see what I can achieve, so far not much

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            • #7
              I think if you need it to retain it's overall shape and wobble, you'd be better off using tyflow. model your jelly object, select it as voxel grid source, create joint physx bindings between each and you're done, with real time simulation results. It's one of the easier things to do in it. You'd then duplicate the source object and add a typarticleskin so it was linked to the particle animation.
              If you then needed the jelly to melt or turn into a phoenix based sim, you could convert the particleskinned mesh at frame 'whatever' once the wobble is more stable as the source for a high viscosity phoenix sim.

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              • #8
                thanks Neilg I see words but don't understand them I just need to spend time understanding the ins and outs of Tyflow I suppose. I think there are a lot of things I am missing out on doing by not having my old brain in amongst Tyflow.

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                • #9
                  Have a watch of this.
                  https://www.youtube.com/watch?v=tkvFOcIqs0k

                  The optimisation stage he does at the start is possibly overkill for you. He makes a custom mesh to birth particles on vertices, but you can just use voxel birth set to surface and use the high res as the source. The relevant part starts 5m 20s in.
                  Aside from that step, it shows you how simple the flow is for something like this.
                  Last edited by Neilg; 26-04-2021, 06:24 PM.

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