Artist-coder David Li has created an awesome browser-based simulation of fluid dynamics called "Vortex Spheres."The video above shows it in action, but you can play around with it yourself on Li's website, controlling the flow of the simulated liquid by toggling different quantities for variation and radius. There's also a "drop" button so you can watch the column of liquid collapse.It's worth checking out the rest of Li's site to get a look at his other projects, including this cool wave simulator and a MIDI keyboard-driven smoke simulator.