CellFluids is a Geometry Nodes powered addon for simulating fluids.
The simulation is sort of “2.5D”. It is based on the scene’s height field and simulated in 2d grid mesh with displacement applied to it.
Requires Blender 3.6 or newer versions.
Check out the Documentation here.
Fast interactive semi-realtime fluid simulations
Lightweight and not resource intensive
Works with both Eevee and Cycles
Baking any state of the fluid to static mesh with flow map
It can’t simulate complex and multilayered fluids and splashes, as it is just a plane with displacement.
The simulation is not particle-based, don’t expect fully physically accurate simulations.
Avoid sharp edge geometry for ground, it can stick out of the fluid in some cases.
The ground geometry can’t be animated.