Mathematical Modeling and Simulation of Fluidized Beds

In a certain low range of the flow rate, the system will behave like a fixed bed, i.e., the gas stream will flow through a fixed porous medium. 

The minimum fluidization condition refers to the situation in which AP, the pressure drop across the bed, is equal to the bed weight. 

A freely bubbling fluidized bed has a higher flow rate of the gas than the minimum fluidization limit. It will reach the case of three phases solid, gas in contact with solid, and gas in bubbles inside the tube. 

Fine powder inside a tube starting to fluidize due to gas flow rate 

In this context we adhere to the two-phase theory of fluidization, which states that almost all the gas in excess of that necessary for minimum fluidization will appear as 

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Dynamic Model for the Catalyst Pellet Mathematical Modeling and Simulation of Fluidized-Bed Reactors... 

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