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為什么高爾夫球上有“酒窩”？
Why do golf balls have dimples?
[ 2007-06-01 12:31 ]
在高爾夫球上，我們會看到有很多凹陷，就像人臉上的酒窩一樣。不過，這些凹陷可不是為了讓球“美觀”，而是為了讓它飛得更遠。這是什么原理呢？下面這篇文章將會告訴你。
 So that they look cute? NO!
Because the dimples maximize the distance golf balls travel. Dimpled balls travel up to four times farther than smooth-surfaced golf balls.
In the early days of golf, smooth-surfaced balls were used until golfers discovered that old, bumpy balls traveled longer distances. The science ofaerodynamicshelps explain the dimpled phenomenon. The dimples reduce the drag on a golf ball by redirecting more air pressure behind the golf ball rather than in front of it. The higher levels of pressure behind the golf balls force them to go far distances.
The dimples change the levels of pressure by bringing the main air stream very close to the surface of the golf ball. The dimples, or "turbulators," increase the turbulence in the layer of air located next to the surface of the ball. This high-speed air stream near the ball increases the amount of pressure behind the ball-thereby forcing the ball to travel farther.
aerodynamics: 空氣動力學
（來源：coolquiz.com 英語點津 Annabel 編輯）
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