Fluid Fishbone Effect : 2012

Photograph by

Ted Kinsman

About this image

High-speed flash image capturing the beautiful symmetrical pattern formed by two colliding fluid streams. The fluid here is glycerol with 10 percent water and the streams come from 1 millimetre diameter nozzles. As the streams collide, the combination of momentum and surface tension initially form a thin sheet. This rapidly becomes unstable, with most of the fluid volume forming droplets originating from the edge of the sheet, with the sheet itself breaking into a pair of ‘reflected’ droplet streams that soon combine directly below the collision point. The morphology of this pattern, known as a fishbone or herringbone, is strongly dependent on the flow velocity and the viscosity of the fluid. This image was captured with a flash duration of 25 microseconds and a digital camera. Kinsman Physics Productions, Rochester, New York, U.S.A