Fluid dynamics for the artistically inclined: To create his astounding Black Hole series, which shows paint modeled by centripetal force, photographer Fabian Oefner dripped various shades of acrylic paint onto a metallic rod connected to a drill. Once the drill is switched on, the paint swirls away from the rod, creating astounding structures. Oefner writes:
The motion of the paint happens in a blink of an eye, the images you see are taken only millisecond after the drill was turned on. To capture the moment, where the paint forms that distinctive shape, I connected a sensor to the drill, which sends an impulse to the flashes. These specialized units are capable of creating flashes as short as a 1/40000 of a second, freezing the motion of the paint.