16.4. Flow Over a Sphere: GATE 2017 Question

Try these first

1. 1.

   Define drag force in the context of fluid dynamics.

   Hint

   Think of forces working against motion.

2. 2.

   What signifies laminar flow?

   Hint

   The type of flow seen in calm waters.

3. 3.

   What does the drag coefficient quantify?

   • The resistance of an object in motion
   • The relative force exerted on a body
   • The speed of fluid flow

   Hint

   Think about forces acting on bodies in a fluid.

4. 4.

   True or False: A higher Reynolds number always indicates laminar flow.

   • True
   • False

   Hint

   Consider what Reynolds number signifies regarding flow.

5. 5.

   A sphere of diameter 250 mm is placed in water (density = 1000 kg/m³) and flows at a speed of 4 m/s. Compute the drag force if C = 0.5.

   Hint

   Ensure you keep units consistent!

6. 6.

   How would introducing turbulence affect the Reynolds number calculation for the same sphere and fluid conditions explained above?

   Hint

   Consider what turbulent flow signifies!