A model of a golf ball is to be studied to determine the effects of the dimples. A sphere 10 times larger in diameter than an actual golf ball is used in the wind tunnel study. What speed should be selected for the model to simulate a prototype speed of 50 m/s?
- A. 0.2m/s
- B. 5m/s
- C. 50m/s
- D. 10m/s
Answer: B. 5m/s
Explanation: Reynolds number similarity: Vm Dm = Vp Dp. Vm (10 Dp) = 50 Dp. Vm = 5 m/s.