18.5.3. Control Volume Approach for Unsteady Flow

Try these first

1. 1.

   What is the Reynolds transport theorem?

   Hint

   Think of it as a bridge between theoretical concepts and real-world applications.

2. 2.

   Define incompressible flow.

   Hint

   Consider examples of liquids versus gases.

3. 3.

   What is the control volume approach primarily used for?

   • Understanding gravity
   • Analyzing fluid flow
   • Calculating energy loss

   Hint

   Consider what happens within defined limits in fluid systems.

4. 4.

   True or False: Incompressible flows can have varying densities.

   • True
   • False

   Hint

   Think about the simplifications we apply in incompressible flows.

5. 5.

   A tank experiences varying inflows and outflows. Calculate the change in volume over time, considering the inflow rate is twice the outflow in a steady state.

   Hint

   Derive the relationship based on given conditions and integrate over the required time period.

6. 6.

   Determine the forces acting on a control volume when the fluid enters at high velocity while the control volume itself is moving.

   Hint

   Consider external influences and forces from within the fluid body.