1.3.4. Classification Based on Froude Number

Try these first

1. 1.

   What is the formula for Froude number?

   Hint

   Identify the components of the formula to get the answer.

2. 2.

   What flow type does a Froude number less than 1 indicate?

   Hint

   Think about what wins between inertia and gravity.

3. 3.

   What is the Froude number if the flow velocity is 4 m/s, the depth is 2 m, and g is 9.81 m/s²?

   • 0.5
   • 1.0
   • 1.5

   Hint

   Use the given formula to solve.

4. 4.

   True or False: A flow with Froude number greater than 1 is called subcritical.

   • True
   • False

   Hint

   Remember the definitions of flow types.

5. 5.

   A river channel with a depth of 1.5 m has a flow velocity of 3 m/s. Calculate the Froude number and classify the flow type.

   Hint

   Don't forget to use the acceleration due to gravity in your calculations.

6. 6.

   Discuss the impact of transitioning from critical to supercritical flow on a river's ecosystem.

   Hint

   Consider how changes in flow speed affect riverbanks and organisms.