Head When Discharge For Triangular Weir Angle Is 90 Calculator

Formula Used:

\[ H = \frac{Q_{tri}}{\left(\frac{8}{15} \times C_d \times \sqrt{2g}\right)^{2/5}} \]

Discharge through Triangular Weir (Q_tri):

m³/s

Coefficient of Discharge (C_d):

Acceleration due to Gravity (g):

m/s²

Height of Water above Crest of Weir (H):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Head When Discharge For Triangular Weir Angle Is 90?

The Head When Discharge For Triangular Weir Angle Is 90 refers to the height of water above the crest of a triangular weir with a 90-degree angle, calculated based on the discharge rate, coefficient of discharge, and gravitational acceleration.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ H = \frac{Q_{tri}}{\left(\frac{8}{15} \times C_d \times \sqrt{2g}\right)^{2/5}} \]

Where:

\( H \) — Height of Water above Crest of Weir (m)
\( Q_{tri} \) — Discharge through Triangular Weir (m³/s)
\( C_d \) — Coefficient of Discharge
\( g \) — Acceleration due to Gravity (m/s²)

Explanation: This formula calculates the water height above the weir crest based on the discharge rate and other hydraulic parameters for a 90-degree triangular weir.

3. Importance of Height Calculation

Details: Accurate calculation of water height above the weir crest is essential for hydraulic engineering, flow measurement, and water resource management in open channel flow systems.

4. Using the Calculator

Tips: Enter discharge in m³/s, coefficient of discharge as a dimensionless value, and gravitational acceleration in m/s². All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is a triangular weir?
A: A triangular weir is a flow measurement device with a V-shaped notch, typically used for measuring small to moderate discharge rates in open channels.

Q2: Why is the 90-degree angle significant?
A: The 90-degree angle is a standard configuration that provides a good balance between measurement accuracy and structural simplicity.

Q3: What is the typical range for coefficient of discharge?
A: The coefficient of discharge for triangular weirs typically ranges from 0.58 to 0.62, depending on the specific weir geometry and flow conditions.

Q4: How does water height relate to discharge?
A: For triangular weirs, discharge is proportional to the 5/2 power of the water height above the crest, making these weirs sensitive to small changes in water level.

Q5: What are the limitations of this calculation?
A: This calculation assumes ideal flow conditions and may need adjustments for real-world factors such as viscosity, surface tension, and approach velocity effects.