Jan 31

Vertical wind tunnel and patterns in ping pong balls

Carlin used a shop vacuum exhaust and concatenated translucent 3-liter soft drink bottles to form vertical wind tunnel to illustrate balance between aerodynamics and mass.  Videos show patterns in floating ping pong balls using high speed capture.  First video is with 3 ping pong balls and second with 15.  Balls were striped in different colors and patterns to aid in identifying how balls move in airstream, spin, and change places.  Carlin conducted tests, not shown here, on how layers form when additional balls are added.  Fluid dynamics are complicated (the mathematics is advanced), so Carlin is starting with observations of patterns.



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