1. What is the Pump Flow Equation?

The pump flow equation (Q = A × V) calculates the volumetric flow rate of a fluid through a pipe or channel by multiplying the cross-sectional area (A) by the flow velocity (V).

2. How Does the Calculator Work?

The calculator uses the fundamental flow rate equation:

Where:

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

Explanation: This equation represents the volume of fluid passing through a given surface per unit time.

3. Importance of Flow Rate Calculation

Details: Flow rate calculation is essential for designing piping systems, selecting appropriate pumps, calculating system efficiency, and ensuring proper fluid transport in various engineering applications.

4. Using the Calculator

Tips: Enter the cross-sectional area in square meters (m²) and flow velocity in meters per second (m/s). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for the calculation?
A: The calculator uses SI units (m² for area and m/s for velocity), resulting in m³/s for flow rate. Convert other units to these before calculation.

Q2: How do I calculate cross-sectional area for circular pipes?
A: For circular pipes, A = π × r² where r is the pipe radius. Remember to convert diameter to radius (r = d/2).

Q3: What affects flow velocity in a pipe?
A: Velocity depends on pump power, pipe diameter, fluid viscosity, and system pressure among other factors.

Q4: Can I use this for compressible fluids?
A: This simple equation works best for incompressible fluids. For compressible fluids, additional factors like density changes must be considered.

Q5: How does pipe roughness affect the calculation?
A: Pipe roughness affects velocity (through friction losses) but not the basic Q = A × V relationship. It's accounted for in more detailed hydraulic calculations.