22.8. Conclusion

Try these first

1. 1.

   Define hydraulic diameter.

   Hint

   Think of how you measure the perimeter of a noncircular pipe.

2. 2.

   Explain the difference between major and minor losses in pipe flow.

   Hint

   What types of disturbances cause extra friction?

3. 3.

   What is the role of hydraulic diameter in noncircular pipe flow?

   • To calculate flow velocity
   • To simplify calculations
   • To measure pressure loss

   Hint

   Think about why we need a common measure for different shapes.

4. 4.

   Wall shear stress is highest at the center of the flow in which type of flow?

   • True
   • False

   Hint

   Where does it reach zero?

5. 5.

   Given a rectangular channel with a width of 5 m and a height of 2 m, find the hydraulic diameter when the channel is half full.

   Hint

   Think about how the area changes when the channel is half full.

6. 6.

   A pipe with a diameter of 0.5 m has a length of 100 m. Calculate the major loss in energy when the flow rate is 0.1 m³/s, using Darcy-Weisbach equation.

   Hint

   Remember to find the flow velocity using the area of the pipe first.