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NVIDIAGameWorks / PhysX-3.4

NVIDIA PhysX SDK 3.4
https://www.nvidia.com/
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Investing Particle/Solid interaction #9

Closed ngartner closed 7 years ago

ngartner commented 7 years ago

Hello everyone,

I am trying to investigate simulation using SPH solver for particles just like in PhysX or FleX (Well for FleX I'm not 100% sure it is SPH), involving mechanical systems.

Actually Particles were removed from PhysX (or are going to be removed or whatever) because FleX is more performant. But FleX is not really practical to create mechanisms. (No Joint features). Are you going to create these features in FleX ?

I am trying to get realistic Water in PhysX. Has someone already found the ideal parameters to apply on the ParticleFluid system ? (Material, Viscosity, Stiffness, ParticleMass)

Thanks !

sschirm commented 7 years ago

Hello, Sorry, I don't have a good solution for you. PhysX particles are not really good for stable solid/liquid interaction, because the SPH solver is explicitly coupled to the rigid body solver, leading to instabilities that are hard to control. You can already animate individual particles in FLEX to join them to a static or moving frame, if that is enough for you. This would work for spinning water wheels for example.