About this 3D model

Oil and colored water in an enclosed volume. The system has some interesting dynamics:http://www.youtube.com/watch?v=qKU1z01YzcAThe OpenSCAD file is parametric, so you can experiment to change the flow parameters. The default parameters make the flow somewhat slow, so you could try to make bigger chambers/channels if your printer bridging performance is good enough. If someone knows of another safe immiscible fluid combination that is less viscous, I would be enjoy being told about it.