Learning Forum

[despinosam]

Hello,

 

I have the geometry shown in the image. I'm supposed to simulate a fluidized bed reactor. I have divided my geometry into two parts. The red one is the freeboard where gas an solid particles interact, and the green one is to distribute the gas to the bed. However, while doing the simulation some particles of the bed seem to fall into the green zone. I don't know how to restrict the bed particles so they just interact in the red zone. I would really appreciate if someone could help me.

 

Thanks,

 

Daniela

[rachels1001]

if you don't want to solids in the bed to move, and just react with the gas, and you have set your simulation as multiphase, you could specify the velocity of the solids to be 0 within the cell zone. This would prevent them from falling down into the green zone, but wouldn't fix the velocity of the gas. 

[DrAmine]

Thanks for the comments.

Or split the whole run into two runs and use profile for velocity and other quantities as boundary condition.

[despinosam]

Thank you! This totally solved my problem.