From a quick search, there are quite a few on Github. Can't point to a specific one, though. I implemented a very basic 2D version on one of my MSc classes, and

From a quick search, there are quite a few on Github. Can't point to a specific one, though. I implemented a very basic 2D version on one of my MSc classes, and although we used MATLAB, it was quite fast depending on grid size/fluid properties.