Have you ever wonder why popcorn is popped up so uniformaly ? The process called as fluidization plays the mazor part to provide uniform heat to the substance. This presentation provides the basic equation and processes involves in the fluidization.

1. Divyam Jha
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2. Fluidizatio:
• What is fluidization ?
• What is the use of Fluidization?
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3. Forces participating for particles
to get fluidized:
• Drag Force: FB FD
FD depends on W,density, and area of the object
0.4<CD<1 depends on Reynolds number
• Buoyant Force:
• Archimedes' Principle W
FD=1/2 х CDхρfV2 х A
FB = weight of the fluid
displaced=Wf
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4. Phenomena of fluidization:
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Ref: D. Kunii and O. Levenspiel, Fluidization Engineering
(Melbourne, Fla.: Robert E. Krieger Publishing Co., 1977).

5. Pressure drop vs. Velocity profile:
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Ref: Warren L. McCabe, Julian C. Smith, Peter Harriott. Title: Unit Operations
of Chemical Engineering. Publisher: McGraw-Hill, Inc. 5th edition

6. Ergun equation for fluidized condition:
• Kozney carman equation for laminar flow(low flow rate)
Reynolds number<1.
• Burke Plummer equation for turbulent flow(high flow rate)
Reynolds number>1000
•
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7. Minimum fluidization velocity:
• Velocity at which
pressure drop
becomes constant
,and particles are fully
suspended in the fluid
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