The study focused on the flow dynamics of cricket balls spinning at up to 2,500 revolutions per minute in a wind tunnel.
The research team used a special device called a wake survey rake, which is made up of several tubes that capture pressure changes behind the ball.A key strategy in winning a cricket match is to outsmart the opposing team’s batsmen, which isn’t easy when bowlers are hurling balls at nearly 100 miles per hour.
Researchers have begun to understand why this type of bowling is so hard to hit. By using a wind tunnel, the research team studied how the spinning of the ball, caused by the near-horizontal bowling action, changes the surrounding air pressure, making the ball difficult for batters to play. “Their bowling techniques frequently deceive batsmen, rendering these bowlers effective throughout all phases of a match in almost all formats of the game.”How much and in what way a cricket ball curves during its flight depends a lot on the relationship between the ball’s spin and something called the Reynolds number. This is a measure that combines factors like air density, the size of the ball, airspeed, and air viscosity.
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