What is the coefficient of discharge for triangular notch?

The coefficient of discharge obtained is: 0.469 for v- notch and 0.3252 for rectangular notch. Thus, rectangular notch has lower discharge than the triangular notch.

What is a triangular notch?

Triangular weirs are sharp crested thin plates with V-shaped opening (or notch). These plates are installed at the exit of a channel, tank, or basin in order to measure the real-time flow of water. For a given weir profile size and shape, the flow of water is related to the head of water at the weir.

For which angle a triangular notch has maximum discharge?

The notch angle for maximum discharge over a triangular notch, is 30°

Why do we use triangular notch?

The triangular-notch,thin-plate weir is used widely for measuring the flow of liquids in flumes and open channels. Simple in design and easily made from readily available materials, it is inexpensive, convenient to use, and easy to maintain.

What are the advantages of triangular notch over rectangular notch?

A triangular notch gives much more accurate results in low discharge conditions, as compared to the conventional rectangular notch. Also, only one reading (the head) is required to calculate the discharge rate, making calculations much easier. However, it cannot handle large volumes of flow rate accurately.

Which notch is more accurate?

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.

Why no ventilation is required in triangular notch?

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. Only one reading of H will be required for determination of discharge in case of triangular notch.

What is the angle of triangular notch?

90° Triangular Notch Weirs The bottom of the notch is the lowest point with the sides going up at 45 degree angles.

Which is more accurate rectangular notch or triangular weir?

The results of which are more accurate; rectangular notch or triangular weir. Explanation: The results of triangular notch are more accurate for low discharge. Explanation: H i.e height is main reading required in calculation for rectangular notch or weir. 9.

How discharge is measured using a notch?

The discharge over notch is measured by measuring the head acting over the notch. As water approaches the notch, its surface becomes curved. Therefore, the head over the notch is to be measured at the upstream of the notch where the effect of curvature is minimum.

Is not necessary in a triangular notch?

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 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.

How to calculate the discharge over a triangular notch or weir?

After securing the expression for discharge through the elementary horizontal strip, we will integrate the expression between the limit 0 to H and we will have the expression for the discharge over entire triangular notch or weir. dQ = Cd x Area of strip x Theoretical velocity.

What is the difference between triangular notch and rectangular 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. A right-angled V-notch was used to measure the discharge of a centrifugal pump.

What are the different types of notches?

Classification of Notches and Weir  The notches are classified as;  According to the shape of the opening: 1. Rectangular Notch 2. Triangular Notch 3. Trapezoidal Notch 4. Stepped Notch  According to the effect of the sides of the nappe: 1. Notch with end contraction 2. Notch without end contraction or suppressed notch