19.3.1. Considering Gauge Pressure

Try these first

1. 1.

   What is gauge pressure?

   Hint

   Think about how you measure pressure in everyday items.

2. 2.

   List two components of the stress tensor.

   Hint

   Consider the forces acting on fluid surfaces.

3. 3.

   What is the primary consideration when defining gauge pressure?

   • Pressure relative to zero pressure
   • Pressure above atmospheric pressure
   • Total pressure acting on an object

   Hint

   Think about how you would measure pressure around us.

4. 4.

   True or False: Shear stress occurs perpendicular to the surface.

   • True
   • False

   Hint

   Consider how forces act on a surface.

5. 5.

   Given a fluid with a known shear stress and pressure gradient, derive the total stress tensor in a control volume.

   Hint

   Focus on combining the shear and normal stress equations into a tensor format.

6. 6.

   In a hydraulic system operating at varying atmospheric pressures, discuss how control volumes would be defined to isolate the internal fluid pressures.

   Hint

   Consider how changes in external conditions demand adjustments in the definitions of your control volume.