The image above represents ratio of linear velocity of gas.

To compute for ratio of linear velocity of gas, three essential parameters are needed and these parameters are **Porosity (e), Bubble Velocity (u _{b})** and

**Sedimentation Velocity (u**

_{c}).The formula for calculating ratio of linear velocity of gas:

α = e(^{ub}/_{uc})

Where:

α = Ratio of Linear Velocity of Gas

e = Porosity

u_{b} = Bubble Velocity

u_{c} = Sedimentation Velocity

Let’s solve an example;

Find the ratio of linear velocity of gas when the porosity is 8, the bubble velocity is 10 and the sedimentation velocity is 14.

This implies that;

e = Porosity = 8

u_{b} = Bubble Velocity = 10

u_{c} = Sedimentation Velocity = 14

α = e(^{ub}/_{uc})

α = 8(^{10}/_{14})

α = 8(0.714)

α = 5.71

Therefore, the **ratio of linear velocity of gas **is **5.71.**

**Calculating the Porosity when the Ratio of Linear Velocity of Gas, the Bubble Velocity and the Sedimentation Velocity is Given.**

e = ^{α x uc} / _{u}_{b}

Where:

e = Porosity

α = Ratio of Linear Velocity of Gas

u_{b} = Bubble Velocity

u_{c} = Sedimentation Velocity

Let’s solve an example;

Find the porosity when the ratio of linear velocity of gas is 30, the bubble velocity is 5 and the sedimentation velocity is 3.

This implies that;

α = Ratio of Linear Velocity of Gas = 30

u_{b} = Bubble Velocity = 5

u_{c} = Sedimentation Velocity = 3

e = ^{α x uc} / _{u}_{b}

e = ^{30 x 3} / _{5}

e = ^{90} / _{5}

e = 18

Therefore, the **porosity **is **18.**

Continue reading How to Calculate and Solve for Ratio of Linear Velocity of Gas | Fluidization