What are the advantages of triangular notch and rectangular notch?
A triangular notch gives more accurate results for low discharge than rectangular notch and the same triangular notch can measure a wide range of flow accurately. Actual discharge of V-notch is better than the rectangular notch.
What are the advantages and disadvantages of V notch?
Sharp crested V notch weir (extended measurement error – 3\%) is preferably used in locations with high range of discharge….
| Advantages | Disadvantages |
|---|---|
| High adaptability to the measurement range | High headloss |
| Extensive build up space | |
| High requirements for the calming of the velocity field | |
| Most frequent errors |
Why do we use rectangular notch?
The rectangular weir (notch) is a common device used to regulate and measure discharge in irrigation projects. The results obtained from this research indicate that the relationship between the discharge coefficient and the upstream water depth is a power function.
What is rectangular notch?
It may be defined as an opening in the side of a tank or vessel such as liquid surface in the tank is below the level of opening. The edges of the notch are bevelled on the downstream side so as to have a sharp-edged sides and crest resulting in minimum contact with the flowing fluid.
Why is V-notch better than rectangular notch?
V-notch has high coefficients discharge compared to rectangular notch. V-notch gives more accurate results for low discharge coefficientcompared to rectangularnotch. This is due to the space for the water to flow through the notch. For rectangular notch, the space of water it is constant for every depth.
Which of the following is an advantage S of triangular notch over rectangular notch?
Triangular notch will provide more precise results during measuring low discharge as compare to result obtained from rectangular notch.
What is a rectangular notch?
How do you calculate discharge using rectangular notch?
The formula for Discharge in Rectangular Notch is – (Where B = width of notch, and H = height of liquid above the sill of the notch)
- 3 2 C d L 2 g H 3 / 2.
- 3 2 C v L 2 g H 3 / 2.
- 3 2 C c L 2 g H 3 / 2.
- 2 3 C d L 2 g H 3 / 2.
Why CD of triangular notch is more than rectangular notch?
The average discharge coefficients in rectangular notch is lower than average discharge coefficients in V-notch.As the flow rate increases, the discharge coefficient becomes more accurate to the theoretical value. This is due to the space for the water to flow through the notch.
What is the advantage of using a V-notch weir over a rectangular weir?
Because the V-notch weir has no horizontal crest length, the head required for a small flow through it is greater than that required with the other weir types. This greater head is an advantage because nappes of smaller discharges will spring free of the crest.
Is rectangular notch or triangular weir more accurate?
7. The results of which are more accurate; rectangular notch or triangular weir. Explanation: The results of triangular notch are more accurate for low discharge.