[fredrick]

I'm new in Fluent and working on a multiphase problem. My model has solid bed, perforated holes and and inlet section below. See the picture I have attached to visualize.

Question: How do I ensure that the solid particles do not flow to the reverse direction (towards the holes and the inlet). This will definitely clog the holes and affect the results. Thank you in advance



Note: I do not want to use porous medium because I do not have the data required to calculate various coefficients.

[vinerm]

If the solid bed is a packed bed, then enable that under Multiphase Flow setup. Go to cell zone conditions and fix the velocities for the solids to 0. This will ensure that bed behaves like a packed bed and not as a fluidized one.

[fredrick]

Originally Posted by vinerm

If the solid bed is a packed bed, then enable that under Multiphase Flow setup. Go to cell zone conditions and fix the velocities for the solids to 0. This will ensure that bed behaves like a packed bed and not as a fluidized one.

Thank you very much for the reply. It is a fluidized bed.



What other suggestions do you have??

[vinerm]

If it is a fluidized bed, then you should not use packed bed condition. However, there is a minimum velocity known as fluidization velocity. If the velocity is lower than that, then the fluidization will not take place and the granular material will try to block inlets. So, you need higher flow rate.

[fredrick]

Originally Posted by vinerm

If it is a fluidized bed, then you should not use packed bed condition. However, there is a minimum velocity known as fluidization velocity. If the velocity is lower than that, then the fluidization will not take place and the granular material will try to block inlets. So, you need higher flow rate.

Thank you Vinerm for the help.