7.3. Control Volumes and Forces

Try these first

1. 1.

   What is a control volume?

   Hint

   Think about how we can focus on a specific area in fluid flow.

2. 2.

   Name one example of a body force.

   Hint

   Think about forces acting throughout the mass of the fluid.

3. 3.

   What does a control volume represent in fluid mechanics?

   • A fluid property
   • A defined space in fluid flow analysis
   • A type of fluid

   Hint

   Think about how we can specify regions in a flow system.

4. 4.

   Which of the following is a surface force?

   • True
   • False

   Hint

   Remember the definitions of both force types.

5. 5.

   A fluid flows due to gravity along a channel. Discuss the control volume approach to analyze the forces acting on the fluid.

   Hint

   Draw a diagram of the control volume and consider forces acting in different directions.

6. 6.

   Describe how assuming incompressible and isothermal flow simplifies the Navier-Stokes equations and give an example.

   Hint

   Reflect on scenarios in everyday life, like plumbing systems.