Section: Fluid Mechanics | Marks: 2
Air flows over a spherical storage vessel of diameter 4 m at a speed of 1 m/s. To find the drag force on the vessel, a test run is to be carried out in water using a sphere of diameter 100 mm. The density and dynamic viscosity of air are 1.2 kg/m3 and 1.8 ×10-5 Pa.s, respectively. The density and dynamic viscosity of water are 1000 kg/m3 and 10-3 Pa.s, respectively. The drag force on the model is 4 N under dynamically similar conditions. The drag force (in N) on the prototype is approximately
- A. 0.25
- B. 0.93
- C. 1.08
- D. 4
Answer: C. 1.08