2. Department of Civil Engineering

Try these first

1. 1.

   What is the Reynolds number threshold for turbulent flow?

   Hint

   Think about the critical value for flow transitions.

2. 2.

   What kind of flow is characterized by a smooth velocity profile?

   Hint

   Recall the first type of flow we discussed.

3. 3.

   What is the primary factor determining whether flow is laminar or turbulent?

   • Viscosity
   • Reynolds Number
   • Temperature

   Hint

   Consider the dimensionless ratio that helps identify flow types.

4. 4.

   Turbulent flow is generally associated with higher or lower pressures?

   • Higher
   • Lower

   Hint

   Think about how energy is dissipated in turbulent flow.

5. 5.

   Given a pipe diameter of 0.1 meters, find the roughness height if the velocity at 0.04m from the wall is 40% greater than that at 0.01m from the wall.

   Hint

   Formulate expressions using the velocity ratios and refer to known equations for turbulent flow.

6. 6.

   Evaluate the behavior of turbulent flow as Reynolds number increases, considering both velocity and pressure changes.

   Hint

   Analyze flow behaviors at critical transition points and use visual flow representations if necessary.