Numerical simulation of gas–solid flow with two fluid model in a spouted-fluid bed

• Flow behavior of spouted-fluid bed was predicted using Eulerian–Eulerian two-fluid modeling.
• Gas flux and gas incident angle have significant influence on porosity and particle concentration.
• The fluidizing gas flux affects the flow behavior of particles in the fountain.
• The solids volume fraction is low in the spout and high in the annulus.

The flow characteristics in a spouted-fluid bed differ from those in spouted or fluidized beds because of the injection of the spouting gas and the introduction of a fluidizing gas. The flow behavior of gas–solid phases was predicted using the Eulerian–Eulerian two-fluid model (TFM) approach with kinetic theory for granular flow to obtain the flow patterns in spouted-fluid beds. The gas flux and gas incident angle have a significant influence on the porosity and particle concentration in gas–solid spouted-fluid beds. The fluidizing gas flux affects the flow behavior of particles in the fountain. In the spouted-fluid bed, the solids volume fraction is low in the spout and high in the annulus. However, the solids volume fraction is reduced near the wall.

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