16.3.1. Given Data and Parameters

Try these first

1. 1.

   What is viscosity?

   Hint

   Think about how honey flows compared to water.

2. 2.

   Define shear stress.

   Hint

   Consider applying a force to a fluid's surface.

3. 3.

   What does the Reynolds number indicate in fluid flow?

   • Type of fluid
   • Flow regime
   • Viscosity

   Hint

   Think about how fast the fluid is moving compared to its viscosity.

4. 4.

   True or False: The Euler number helps compare inertial forces to viscous forces.

   • True
   • False

   Hint

   Revisit the definitions of Reynolds and Euler numbers.

5. 5.

   A fluid flows through a pipe with a diameter of 0.5 m, at a velocity of 3 m/s. Its dynamic viscosity is 0.001 Pa·s. Calculate the Reynolds number and determine the flow type.

   Hint

   Ensure to check your density and units.

6. 6.

   Determine the required power in watts to overcome the drag forces on a vehicle with a drag coefficient of 0.3, frontal area of 2.2 m², traveling at 90 km/h.

   Hint

   Convert the velocity to m/s and find density for the calculations.