The speedy secrets of mako sharks -- 'cheetahs of the ocean'

To investigate how shortfin mako sharks achieve their impressive speeds, researchers tested real sharkskin samples, using digital particle image velocimetry. They discovered that a 'passive bristling' capability of the microscopic surface geometry of the shark's scales controlled flow separation, which causes pressure drag -- the most influential cause of drag on aircraft. The work could lead to new designs to reduce drag on aircraft.

from Top Technology News -- ScienceDaily https://ift.tt/2NJqDrj