Gas Flow Velocity Calculator

Flow Velocity Formula:

\[ v = \frac{Q}{A} \]

Flow Velocity (v):

m/s

1. What is a Gas Flow Velocity Calculator?

Definition: This calculator determines the velocity of gas flow through a pipe or duct based on the volumetric flow rate and cross-sectional area.

Purpose: It helps engineers and technicians in HVAC, chemical processing, and other industries where gas flow measurement is important.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ v = \frac{Q}{A} \]

Where:

\( v \) — Flow velocity (meters per second, m/s)
\( Q \) — Volumetric flow rate (cubic meters per second, m³/s)
\( A \) — Cross-sectional area (square meters, m²)

Explanation: The flow rate is divided by the cross-sectional area to determine the average velocity of the gas flow.

3. Importance of Flow Velocity Calculation

Details: Knowing flow velocity is crucial for system design, ensuring proper flow rates, preventing excessive pressure drops, and avoiding erosion or noise issues.

4. Using the Calculator

Tips: Enter the volumetric flow rate in m³/s and the cross-sectional area in m². Both values must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical gas flow velocity in pipes?
A: For HVAC systems, typical velocities range from 5-15 m/s, while industrial applications may go up to 30 m/s.

Q2: How do I calculate cross-sectional area for a circular pipe?
A: Use \( A = \pi r^2 \) where r is the pipe radius, or \( A = \pi d^2/4 \) where d is the pipe diameter.

Q3: Does this work for liquids as well as gases?
A: Yes, the formula applies to both liquids and gases, though the implications of velocity differ.

Q4: Why is flow velocity important?
A: It affects pressure drop, system efficiency, noise levels, and can indicate potential erosion problems.

Q5: How does temperature affect the calculation?
A: Temperature affects gas density but not the velocity calculation directly, as we're using volumetric flow rate.