Full-screen simulation here.
Embedded into website here.
Thanks primarily to PavelDoGreat's WebGL Fluid Simulation.
http://developer.download.nvidia.com/books/HTML/gpugems/gpugems_ch38.html
https://github.com/mharrys/fluids-2d
https://github.com/haxiomic/GPU-Fluid-Experiments
The code is available under the MIT license