1.2. Model Scales

Try these first

1. 1.

   What is the Froude number used for in hydraulic engineering?

   Hint

   Think about how gravity plays a role in flow dynamics.

2. 2.

   Define Reynolds number.

   Hint

   Consider where flow patterns might change.

3. 3.

   What is the definition of the Froude number?

   • Inertial to turbulent forces
   • Inertial to gravitational forces
   • Viscous to inertial forces

   Hint

   Focus on the role of gravity in fluid behavior.

4. 4.

   True or False: Distorted models maintain the same scale in all dimensions.

   • True
   • False

   Hint

   Consider how engineers resolve physical space constraints.

5. 5.

   A hydraulic model designed with a horizontal scale of 1/250 and a vertical scale of 1/50 needs to maintain Froude number similarity. If the prototype's speed is 10 m/s, what should the model's speed be?

   Hint

   Remember to apply the square root to the horizontal scale ratio.

6. 6.

   If a prototype flow has a measured depth of 3 m and utilizes a specific viscosity, how do you ascertain the corresponding depth in a distorted model with a height scale of 1/30?

   Hint

   Directly multiply the prototype depth by the height scale.