This is IMO a more relevant question than it seems. You'd think so, but it's absurdly rare to see real-world uses of demo techniques like this (not only talking about fluid-sims, here). I long wondered why this is (easy answer: because it's hard).

These things are often designed to run very efficiently and getting maximum effect out of limited hardware and memory. It's perfect for, say, a small indie game looking for a cool background effect or something. I'm sure there's examples, but I couldn't even come up with one.

I wrote a game based on Jos Stam's Fluid Dynamics approach 2 years ago [1]. But without any GPU acceleration. It was also discussed on Hacker News [2]. There you can also find links of other computer games which uses fluid dynamics.

[1] https://github.com/s-macke/Interplanetary-Postal-Service

[2] https://news.ycombinator.com/item?id=17993933

https://sandspiel.club/ Uses fluid dynamics to simulate air flow

I forked this with the intention of adding a music visualizer. I never got around to the visualization part, but I did add a few more features, a Soundcloud player, and typescript type annotations:

https://github.com/justjake/WebGL-Fluid-Simulation