20.3.1. Forces Acting on Control Volume

Try these first

1. 1.

   Define a control volume in your own words.

   Hint

   Think about an area where fluid flows and where you can apply laws of motion.

2. 2.

   What is a body force? Give an example.

   Hint

   Consider forces that affect entire volumes.

3. 3.

   What is a control volume?

   • A defined space for fluid analysis
   • A type of fluid
   • A physical law

   Hint

   Consider where fluid mechanics equations are applied.

4. 4.

   True or False: Only body forces are considered in the analysis of control volumes.

   • True
   • False

   Hint

   Remember the types of forces we discussed.

5. 5.

   A cylindrical tank is filled with water. Calculate the net forces acting on the tank walls when water is flowing in at a steady rate. Use the Reynolds transport theorem.

   Hint

   Identify any pressures acting on the tank and how they change as water enters.

6. 6.

   Design a water jet system using conservation of momentum principles. Evaluate the forces acting along the flow direction.

   Hint

   Consider pressure variations along the jet’s path.