1.11. Practical Considerations

Try these first

1. 1.

   What is the Froude number used for?

   Hint

   Think about flows affected by gravity.

2. 2.

   Define Reynolds number.

   Hint

   Focus on the role of viscosity in fluid flow.

3. 3.

   What does the Froude number represent?

   • Viscous forces
   • Gravity effects
   • Inertial forces

   Hint

   Consider its formula and relevance.

4. 4.

   True or False: Reynolds number is utilized for flows dominated by gravity.

   • True
   • False

   Hint

   Revisit your notes on dimensional analysis.

5. 5.

   If a model has a horizontal scale of 1/300 and a vertical scale of 1/75, and a river has a discharge of 200 m³/s, calculate the model discharge.

   Hint

   Keep track of your ratios and remember to square the height ratio!

6. 6.

   Evaluate the Manning's roughness ratio if the model's vertical scale is h_r = 1/60, and the prototype's roughness is n_p = 0.03.

   Hint

   Ensure proper use of exponents while calculating.