Soccer Turbulent Air & Drag

When the airflow over a ball is turbulent, the boundary layer sticks to the ball almost until the air has completely passed over the ball. This produces late separation and a small drag. First published in Physics World magazine, June 1998 pp25–27.

Ball Drag

The drag coefficient of a ball plotted against Reynold’s number – a non-dimensional parameter that takes into account both the velocity and diameter of the ball. The drag coefficient drops suddenly when the airflow at the surface of the sphere changes from laminar to turbulent. The position of the discontinuity depends on the roughness of …

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Spinning Ball

A bird’s-eye view of a football spinning about an axis perpendicular to the flow of air across it. The air travels faster relative to the center of the ball where the periphery of the ball is moving in the same direction as the airflow (left). This reduces the pressure, according to Bernoulli’s principle. The pressure …

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Soccer Ball Physics 2

MSC.Patran Used By Researchers to Model Complex Physics of Soccer Free Kicks SANTA ANA, Calif. — May 31, 2001 — MSC.Software Corp. (NYSE: MNS), the leading global provider of simulation software, services and systems, today announced that MSC.Patran was used by researchers to help solve the mystery of ‘trick’ or ‘bending’ free kicks in soccer. Through the collaboration …

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Soccer Ball Physics

Physics FAQ  Physics 2  Spinning Ball Ball Drag  Turbulent Air  Drag vs. Speed  How To Curve A Football The Physics of Football Article Frequently Asked Questions (FAQ) about the Physics of Soccer Balls Beckham Goal The following article was first published in Physics World magazine, June 1998 pp25–27.   The Physics of Football Bill Shankly, the former manager of Liverpool football club, once said: …

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