Idealized River (IMAGE)
Caption
Researchers from the University of Pennsylvania spent two years constructing an 'idealized river,' a doughnut-shaped apparatus the size of a large fish tank. Within the 'river' a rotating lid drives the flow of liquid over a bed of spherical acrylic particles. By adding a fluorescent dye to the fluid and shining a laser through the apparatus, the team was able to produce images of the internal 'river bed' structure and precisely track the motion of individual particles over the course of days.
Credit
University of Pennsylvania
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