17.6. Conclusion and Summary

Try these first

1. 1.

   What is the Mach number threshold for treating flow as incompressible?

   Hint

   Consider the speed of sound as a reference point.

2. 2.

   Define control volume.

   Hint

   Think about how we isolate parts of a system for analysis.

3. 3.

   What is the definition of incompressible flow?

   • A flow with significant density variation
   • Flow with a Mach number above 0.3
   • Flow with negligible density variation

   Hint

   Think about what Mach number relates to.

4. 4.

   True or False: The Reynolds Transport Theorem relates mass change within a control volume to mass flow rates crossing its boundaries.

   • True
   • False

   Hint

   Consider the importance of conservation laws.

5. 5.

   In a pipeline system with varying diameters, explain how the velocity changes and how you would apply the mass conservation principle to find outflow rates.

   Hint

   Consider how area and velocity interact under mass conservation.

6. 6.

   A fluid has an entrance flow rate of 3 m³/s and exit flow rate of 2.5 m³/s. What is the change in storage within the control volume over a time interval of 5 seconds?

   Hint

   Remember to apply the mass conservation principle to calculate change in storage.