This mod blends together vanilla fluid mechanics with something a little more realistic plus some small additions. Fluids flowing horizontally will not be affected by this mod. Fluids flowing down will take the source with them. This is intentionally not a realistic fluid simulation in order to not break too much of the vanilla gameplay. If you want something more realistic look in the "Similar mods" section down below.
There is also a Forge version

If you are looking for a similar mod for fabric with more realism have a look at Dihydrogen Monoxide Reloaded by CoolMineman
Also there is the similarly realistic forge mod PhysEx
This project uses the Apache 2.0 License. See the file called LICENSE.