1. What is the Flow Rate Equation?

The flow rate equation (Q = A × V) calculates the volumetric flow rate of water through a pipe or channel based on its cross-sectional area and flow velocity.

2. How Does the Calculator Work?

The calculator uses the flow rate equation:

Where:

• \( Q \) — Volumetric flow rate (m³/s)
• \( A \) — Cross-sectional area (m²)
• \( V \) — Flow velocity (m/s)

Explanation: The equation shows that flow rate is directly proportional to both the cross-sectional area and the velocity of the flow.

3. Importance of Flow Rate Calculation

Details: Flow rate calculations are essential for designing water distribution systems, wastewater treatment plants, and hydraulic structures.

4. Using the Calculator

Tips: Enter the cross-sectional area in square meters and flow velocity in meters per second. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use?
A: The calculator uses metric units (m² for area, m/s for velocity, m³/s for flow rate). Convert other units before entering values.

Q2: How accurate is this calculation?
A: The calculation is mathematically precise, but actual flow rates may vary due to factors like pipe roughness and fluid viscosity.

Q3: Can this be used for open channel flow?
A: Yes, the equation applies to both pipe flow and open channel flow situations.

Q4: What about turbulent flow?
A: The basic equation remains valid, but velocity distribution may be non-uniform in turbulent flow conditions.

Q5: How does this relate to mass flow rate?
A: Mass flow rate can be calculated by multiplying volumetric flow rate by fluid density (ρQ).