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Simple volume flow solver (just divergence previous and current frame)

Please, is there a simple solution to compare previous and current frame of volume moving around deforming geometry?

I mean just "air", just compute velocity vector volume "everywhere" around the deforming object in a container.
I dont need turbulence or inertia/momentum/mass of the fluid.
I could use flip solver and extract velocities, but I hope there could be something simpler and computationally faster?


Edited by ikoon

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Gas Project Non Divergent?

I will investigate more

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Hi, probably building simple solver could help you. Check out those tutorials, they explain how to build simple and fast fluid solver.


If I understood correctly, you need to initialize velocity volume (sampled on faces), then for each simulation step: inject into it velocities from animated geometry, do divergence-free projection, advect velocity by itself and repeat... Probably you might need to enforce boundaries to zero out velocity within geometry.

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