22.6.3. Flow in Rectangular Conduits

Try these first

1. 1.

   Define hydraulic diameter.

   Hint

   What does each symbol in the formula represent?

2. 2.

   What is laminar flow?

   Hint

   Think about how the fluid moves in layers without mixing.

3. 3.

   What is hydraulic diameter primarily used for?

   • To measure circular pipes
   • To simplify flow calculations in noncircular conduits
   • To determine fluid velocity

   Hint

   Think about the benefit of hydraulic diameter in calculations.

4. 4.

   True or False: In laminar flow, shear stress is uniform across the flow.

   • True
   • False

   Hint

   Recall the flow characteristics of laminar flow.

5. 5.

   A rectangular channel has dimensions 10m by 5m, and fluid flows at a velocity of 2m/s. Calculate the hydraulic diameter and the shear stress if the fluid is water.

   Hint

   What needs to be calculated first?

6. 6.

   Determine the flow rate and shear stress for a triangular-shaped conduit embankment under various flow regimes with different fluid types.

   Hint

   Understand the geometry and apply the hydraulic diameter formula.