A number of smoothed-particle hydrodynamics fluid simulations have been posted by the developers of DualSPHysics, a software designed to study free-surface flow phenomena such as waves or impact of dam-breaks on off-shore structures. Their latest video shows a simulation that uses more than 10^9 particles, and was carried out using 64 GPUs Tesla 2090. More on DualSPHysics’ Vimeo channel.
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I’m curious what they’re doing differently as SPH tends to be best used in contained flows and not large tank-style simulations like this. Incompressible solvers are normally a better fit for such things.