It's the same demo I "covered" when I was learning glsl for the first time, 8 years ago! It was an absolute instant classic! (and I had forgotten the demo name, so thanks for posting it!)

Is this about the fluid book you posted yesterday? If so, I highly recommend starting with Jos Stam's The Art of Fluid Animation: it assumes almost no math knowledge, gets to the heart of the problem (the pressure-poisson equation) faster than most engineering text books.