Enter the volume flow rate of the phase and the cross-sectional area of medium into the calculator to determine the superficial gas velocity.

## Superficial Gas Velocity Formula

The following formula is used to calculate a Superficial Gas Velocity.

Us = Q / A
• Where Us is the Superficial Gas Velocity (m/s)
• Q is the volumetric flow rate of the phase (m^3/s)
• A is the cross-sectional area of the medium (m^2)

To calculate a Superficial Gas Velocity, divide the flow rate of the phase by the cross-sectional area of the medium.

## What is Superficial Gas Velocity?

Definition:

A superficial gas velocity is an estimation of the speed at which fluid or gas moves through an object.

## How to calculate Superficial Gas Velocity?

Example Problem:

The following example problem outlines how to calculate Superficial Gas Velocity.

First, determine the volumetric flow of the gas in the phase. For this example, the flow rate is 50m^3/s.

Next, determine the cross-sectional area of the medium. The cross-sectional area in this example is 25 m^2.

Finally, calculate the Superficial Gas Velocity using the formula above:

Us = Q / A

Us = 50 / 25

Us = 2 m/s