17.1.3. Volumetric Flux and Control Volume

Try these first

1. 1.

   What is the condition for a flow to be considered incompressible?

   Hint

   Think about the relationship between flow speed and sound.

2. 2.

   Define volumetric flux.

   Hint

   What two quantities are multiplied to get this?

3. 3.

   What Mach number indicates a flow can be considered incompressible?

   • <0.1
   • <0.3
   • <0.5

   Hint

   Refer to the definitions we discussed in class.

4. 4.

   True or False: Volumetric flux is affected by variations in density.

   • True
   • False

   Hint

   Think about the assumptions we're making with incompressible flow.

5. 5.

   In a cylindrical tank, the inflow is 50 liters/min and the outflow is 40 liters/min. Calculate the change in fluid storage over one hour.

   Hint

   Remember to calculate how much is entering versus leaving.

6. 6.

   Assuming a velocity profile across a pipe, how would you estimate the volumetric flow rate if the average velocity is 2 m/s and the pipe diameter is 0.1 m?

   Hint

   Use J to calculate area based on diameter!