Interactive Self-Study Module: Calculating Velocity in Pipe Flow

Overview:

This module uses a screencast to introduce how to calculate velocity and volumetric flow rate in a pipe. The techniques to do so are explained through equations and examples. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests, and you try to solve the example problem before watching the solution in the screencast. We suggest using the learning resources in the following order:

  1. Attempt to answer the multiple choice ConcepTest and solve the example problem before watching the screencasts.
  2. Watch the screencast that provides an introduction to the techniques and study the equations.
  3. Review important equations for calculating velocity in pipe flow.
  4. Try to solve the example problem before watching the solution in the screencast.
  5. Answer the ConcepTests.
  6. Look at the list of key points, but only after you try to list the key points yourself.
Motivation:
  • Calculating velocity and volumetric flow rate in a pipe are common engineering problems.
  • This module is intended for fluid mechanics courses.
Before studying this module, you should be able to:
  • Change volumetric flow rate into velocity.
  • Explain the concept of the Reynolds number (Re) and calculate it.
  • Use the energy equation.
  • Describe minor and major head loss.
  • Use the Moody chart.
After studying this module, you should be able to:
  • Simplify the energy equation to be able to find velocity.
  • Calculate velocity given pressure drop or other variables.
  • Use Goal Seek or iteration to find a friction factor.