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# How to Calculate and Solve for Pressure Drop Across Bed | Fluidization

Last Updated on July 24, 2021

The image above represents pressure drop across bed.

To compute for pressure drop across bed, four essential parameters are needed and these parameters are Acceleration due to Gravity (g), Porosity (e), Density of Solid (ρs) and Density of Liquid (ρ).

The formula for calculating pressure drop across bed:

-ΔP = (1 – e)(ρs – ρ)g

Where:

-ΔP = Pressure Drop Across Bed
g = Acceleration due to Gravity
e = Porosity
ρs = Density of Solid
ρ = Density of Liquid

Let’s solve an example;
Find the pressure drop across bed when the acceleration due to gravity is 12, the porosity is 21, the density of solid is 18 and the density of liquid is 10.

This implies that;

g = Acceleration due to Gravity = 12
e = Porosity = 21
ρs = Density of Solid = 18
ρ = Density of Liquid = 10

-ΔP = (1 – e)(ρs – ρ)g
-ΔP = (1 – 21)(18 – 10)12
-ΔP = (-20)(8)12
-ΔP = (-20)(96)
-ΔP = -1920

Therefore, the pressure drop across bed is -1920 atm.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the pressure drop across bed.

To get the answer and workings of the pressure drop across bed using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

To get access to the professional version via web, you need to register and subscribe for NGN 2,000 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.

Now, Click on Fluidization under Materials and Metallurgical

Now, Click on Pressure Drop Across Bed under Fluidization

The screenshot below displays the page or activity to enter your values, to get the answer for the pressure drop across bed according to the respective parameter which is the Acceleration due to Gravity (g), Porosity (e), Density of Solid (ρs) and Density of Liquid (ρ).

Now, enter the values appropriately and accordingly for the parameters as required by the Acceleration due to Gravity (g) is 12, Porosity (e) is 21, Density of Solid (ρs) is 18 and Density of Liquid (ρ) is 10.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the pressure drop across bed and presents the formula, workings and steps too.