Effects of turbulence on the drag force on a golf ball

被引：9

作者：

Cross, Rod ^{[1
]}

机构：

[1] Univ Sydney, Dept Phys, Sydney, NSW, Australia

来源：

EUROPEAN JOURNAL OF PHYSICS | 2016年 / 37卷 / 05期

关键词：

dimples; Reynolds number; drag crisis; separation point; WATER; SPHERES;

D O I：

10.1088/0143-0807/37/5/054001

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

Measurements are presented of the drag force on a golf ball dropped vertically into a tank of water. As observed previously in air, the drag coefficient drops sharply when the flow becomes turbulent. The experiment would be suitable for undergraduate students since it can be undertaken at low ball speeds and since the effects of turbulence are easily observed on video film. A modified golf ball was used to show how a ball with a smooth and a rough side, such as a cricket ball, is subject to a side force when the ball surface itself is asymmetrical in the transverse direction.

引用

页数：9

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