- #1
Bararontok
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A golf ball without dimples experiences more drag because the deflection area of the airflow around the ball is larger which means that the pressure drop behind the golf ball is also higher. The increased drop in pressure creates a suction vacuum behind the golf ball which pulls it back and decreases its velocity and range. The dimpled golf ball on the other hand experiences less drag because the dimples create a turbulence that causes a larger surface area of the golf ball to be covered by the flowing air which decreases the size of the vacuum behind the golf ball and subsequently its drag. So if the drag reduction caused by the dimples can be used on golf balls, then why not use this technique on the bodies of motor vehicles and aircraft to increase their range and speed?
Sources: http://wings.avkids.com/Book/Sports/instructor/golf-01.html
http://www.youtube.com/watch?v=nufXpDBELdQ&feature=related
Sources: http://wings.avkids.com/Book/Sports/instructor/golf-01.html
http://www.youtube.com/watch?v=nufXpDBELdQ&feature=related