1. What is Volumetric Flow Rate?

Volumetric flow rate (Q) is the volume of fluid that passes through a given cross-sectional area per unit time. For air systems, it represents the amount of air moving through a duct, pipe, or opening over time.

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 (m²)
• \( v \) — Velocity of the air (m/s)

Explanation: The equation calculates how much air volume passes through a specific area when moving at a certain velocity over one second.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is essential for HVAC system design, ventilation requirements, industrial processes, and ensuring proper air circulation in buildings and machinery.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for area and velocity?
A: Use square meters (m²) for area and meters per second (m/s) for velocity to get flow rate in cubic meters per second (m³/s).

Q2: How do I convert to other units like CFM?
A: To convert m³/s to CFM (cubic feet per minute), multiply by 2118.88 (since 1 m³/s = 2118.88 CFM).

Q3: What is a typical air velocity in ventilation systems?
A: Typical air velocities range from 2-5 m/s in ductwork, but can vary based on application and system design.

Q4: Can I use this for liquids as well?
A: Yes, this fundamental equation applies to any incompressible fluid, including water and other liquids.

Q5: What if the cross-section is not circular?
A: The equation works for any shape - just calculate the correct cross-sectional area (rectangle: width × height, circle: π × radius², etc.).