Eulerian: Bubble Formation in a Fluidized Bed

This tutorial demonstrates how to model bubble formation in a fluidized bed in Simcenter STAR-CCM+. It simulates the injection of gas into a fluidized bed and monitors the formation and growth of the bubble.

Fluidized beds are formed when a fluid is passed through a solid particulate substance to cause the mixture to flow like a fluid. The formation and propagation of bubbles within the bed affect its heat and mass transfer properties.

The shape of the bubble as well as its quantitative growth has been reported ([970]). The gas injection orifice is 15 mm wide. The superficial gas velocity at the orifice is 10 m/s. The rest of the inlet has a superficial gas velocity of 0.25 m/s; the minimum gas velocity to fluidize the bed. The geometry is shown below.



Index

Description

1

Air outlet

2

Inlet with air orifice

3

Bubble

4

Fluidized bed

5

Free surface