1.6. Energy Ratio

Try these first

1. 1.

   What is the Froude number?

   Hint

   Think about the forces involved in a flowing fluid.

2. 2.

   Explain the purpose of using distorted models in hydraulic engineering.

   Hint

   Consider why you wouldn't always use the same scales.

3. 3.

   What does the Froude number represent?

   • A measure of fluid density
   • Ratio of inertial forces to viscous forces
   • Ratio of gravitational to inertial forces

   Hint

   Think about the forces acting on fluid in gravity.

4. 4.

   True or False: Distorted models require exact scaling of all dimensions.

   • True
   • False

   Hint

   Consider what 'distortion' means in this context.

5. 5.

   Given a model with a Froude number of 0.5 and a prototype with a velocity of 2 m/s, determine the model velocity.

   Hint

   Acknowledge the relationship established by the Froude SoP!

6. 6.

   A model river stretch has a discharge of 30 m³/s with a length scale of 1/100. What is the prototype discharge?

   Hint

   Make sure to apply the cubic relationship correctly for discharge.