PICTURES: Fluid Polygons and Polyhedra

[techpr]

"When a vertical water jet strikes a circular horizontal impactor, the water is deflected into a horizontal sheet. At sufficiently high speeds, the flow results in a circular water sheet, whose radius is set by a balance between inertial and curvature forces..."

More... (http://digg.com/design/PICTURES_Fluid_Polygons_and_Polyhedra)