20.2.1. Recap of Previous Lectures

Try these first

1. 1.

   What does the mass conservation equation state?

   Hint

   Consider how mass behaves in a steady fluid flow.

2. 2.

   Name the two types of forces in fluid mechanics.

   Hint

   Think about forces acting throughout the body's volume and at its surface.

3. 3.

   What principle states that mass cannot be created or destroyed?

   • Momentum Conservation
   • Energy Conservation
   • Mass Conservation

   Hint

   Recall the fundamental laws of physics.

4. 4.

   True or False: Body forces are only gravitational.

   • True
   • False

   Hint

   Think of what forces can act throughout a fluid's volume.

5. 5.

   In a system where the inlet mass flow rate is 12 kg/s and the outlet is 8 kg/s, discuss how this affects the conservation of mass and potential physical explanations.

   Hint

   Consider where the missing mass could have gone.

6. 6.

   Using the Reynolds Transport Theorem, calculate the force exerted on a control volume with an inbound momentum flux of 150 N and an outbound of 100 N.

   Hint

   Apply the basic concept of conservation alongside the Theorem.