Why triangular notch is better than rectangular notch?
A triangular notch is also called a V- notch. A triangular notch gives more accurate results for low discharges than rectangular notch and the same triangular notch can measure a wide range of flow.
What is triangle notch?
A triangular notch is also called a V-notch. Consider a triangular notch, in one side of the tank, over which water is flowing as shown in figure. Let, H = Height of the liquid above the apex of the notch. θ = Angle of the notch.
Which notch gives more discharge?
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.
Which is the most preferred notch and why?
Triangular notch or weir is always preferred over a rectangular notch or weir due to the following reasons. Triangular notch will provide more precise results during measuring low discharge as compare to result obtained from rectangular notch.
Why CD of rectangular notch is less than triangular notch?
Thus, rectangular notch has lower discharge than the triangular notch. The basic principle is that discharge is directly related to the water depth above the bottom of the V- notch, this distance is called head.
What are the different types of notches?
5.1. According to the shape of opening, notches can be classified as
- Stepped notch.
- Trapezoidal notch.
- Triangular notch.
- Rectangular notch.
Why do we use triangular notch?
Triangular notch or weir is always preferred over a rectangular notch or weir due to the following reasons. Ventilation of triangular notch is not necessary. Triangular notch will provide more precise results during measuring low discharge as compare to result obtained from rectangular notch.
What is the use of triangular notch?
The triangular-notch, thin-plate weir is a convenient, inexpensive, and relatively precise flow-measuring instrument. It is frequently used to measure the flow of water in laboratories and in small, natural streams.
Which notch is a combination of rectangular notch?
Stepped Notch: A stepped notch is a combination of rectangular notches as shown in figure. It is thus obvious that the discharge over such a notch will be the sum of the discharges over the different rectangular notches.
What is a triangular notch?
A triangular notch is also called a V-notch. A triangular notch gives more accurate results for low discharges than rectangular notch and the same triangular notch can measure a wide range of flows accurately.
Classification of Notches: 1 The Rectangular Notch: 2 The Triangular Notch or V-Notch: ADVERTISEMENTS: 3 The Trapezoidal Notch:
What is the discharge for a right angle V-notch?
The expression for discharge for a right angle V-notch or weir is very simple. Ventilation of triangular notch is not necessary. Triangular notch will provide more precise results during measuring low discharge as compare to result obtained from rectangular notch.
What is the advantage of V notch over rectangular weir?
V notches are preferred in situations where the discharge is not that much high. Thus using a rectangular Weir might not produce that much of H ( distance between the crest and maximum distance of uninterrupted flow) and it might make the the reading of the height difficult. Thus V-notch is preferred over rectangular Weir under these situations