Derivation of a Pressure Field and Fluid at Rest: Summary

The answers to the ConcepTests are given below and will open in a separate window. 
Key points from this module:
  • By using a fluid element, the surface and body forces can be used to derive the equation of motion for a fluid with no shear stresses.
  • If a fluid is at rest, pressure only changes in the z direction.
From studying this module, you should now be able to:
  • Use a differential element to determine the equation of motion for fluid statics and dynamics.
  • Apply Newton’s Second Law to a differential system.
  • Derive the equation of motion for a fluid.
Prepared by Janet deGrazia, Department of Chemical and Biological Engineering, University of Colorado Boulder