1. What is Gas Velocity?

Gas velocity is the speed at which gas flows through a pipe or duct. It's calculated by dividing the volumetric flow rate by the cross-sectional area of the pipe. Understanding gas velocity is important for designing ventilation systems, pipelines, and other gas transport systems.

2. How Does the Calculator Work?

The calculator uses the gas velocity formula:

Where:

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

Explanation: The formula shows that velocity increases with higher flow rates or smaller pipe diameters.

3. Importance of Gas Velocity Calculation

Details: Proper gas velocity is crucial for system efficiency. Too low velocity can lead to sedimentation, while too high velocity increases pressure drop and noise.

4. Using the Calculator

Tips: Enter flow rate in m³/s and cross-sectional area in m². Both values must be positive numbers. For circular pipes, area = π × (diameter/2)².

5. Frequently Asked Questions (FAQ)

Q1: What is typical gas velocity in pipes?
A: Typical velocities range from 5-30 m/s depending on application, with 10-20 m/s common for general purposes.

Q2: How does pipe diameter affect velocity?
A: For a given flow rate, velocity increases as pipe diameter decreases (inverse square relationship).

Q3: What units should I use?
A: The calculator uses SI units (m³/s and m²), but you can convert from other units before entering values.

Q4: Does gas density affect velocity?
A: Not in this basic calculation, but density affects mass flow rate and pressure drop.

Q5: When is high velocity problematic?
A: High velocity can cause erosion, noise, vibration, and excessive pressure drops in the system.