1. What is Gas Flow Velocity?

Gas flow velocity is the speed at which gas moves through a pipe or duct, calculated as the volumetric flow rate divided by the cross-sectional area of the flow path.

2. How Does the Calculator Work?

The calculator uses the velocity formula:

Where:

• \( Flow \) — Volumetric flow rate (m³/s)
• \( Area \) — Cross-sectional area of the pipe/duct (m²)

Explanation: The equation shows that velocity increases with higher flow rates or smaller cross-sectional areas.

3. Importance of Velocity Calculation

Details: Knowing gas flow velocity is essential for designing ventilation systems, determining pipe sizes, ensuring proper gas transport, and avoiding issues like excessive pressure drop or noise.

4. Using the Calculator

Tips: Enter flow rate in m³/s and cross-sectional area in m². Both values must be positive numbers. The calculator will compute the velocity in meters per second (m/s).

5. Frequently Asked Questions (FAQ)

Q1: What are typical gas flow velocities in pipes?
A: For HVAC systems, typical velocities range from 5-15 m/s depending on application and noise considerations.

Q2: How does velocity relate to pressure drop?
A: Higher velocities generally cause greater pressure drops due to increased friction losses.

Q3: Can this be used for liquids as well?
A: Yes, the same formula applies to liquid flow velocity calculations.

Q4: What if my pipe is circular?
A: For circular pipes, area = π × (diameter/2)². Calculate area first, then use this calculator.

Q5: Why is velocity important in system design?
A: Proper velocity ensures efficient transport while minimizing energy losses, noise, and wear on system components.