10.1.4. Shear Strain

Try these first

1. 1.

   What is shear strain?

   Hint

   It relates to deformation without volume change.

2. 2.

   Define boundary layer.

   Hint

   Think about fluid layers close to a surface.

3. 3.

   What is vorticity a measure of?

   • Velocity
   • Rotation of fluid elements
   • Pressure

   Hint

   Think about what describes the motion of particles in flow.

4. 4.

   True or False: All flow is either completely rotational or completely irrotational.

   • True
   • False

   Hint

   Consider scenarios with varying velocity gradients.

5. 5.

   Given a flow with velocity components u = 2xy, v = -x^2, determine the location of irrotational flow.

   Hint

   Recall that vorticity is defined as the curl of the velocity field.

6. 6.

   In an engineered system, a turbine encounters a boundary layer that increases drag by 15%. Discuss possible methods to reduce this effect.

   Hint

   Think about shapes and surfaces that disrupt flow optimally.