I use a stl geometry in a rectangular spouted bed. However, particles could not be blowed up.
19.zip (93.8 KB)
There is no fluid mesh, all the cells are blocked:
GRID STATISTICS:
NUMBER OF CELLS = 1620
NUMBER OF STANDARD CELLS = 0 ( 0.00 % of Total)
NUMBER OF CUT CELLS = 0 ( 0.00 % of Total)
NUMBER OF BLOCKED CELLS = 1620 (100.00 % of Total)
I scaled the stl file in the z direction by 1.1 to get the stl file outside of the domain. This seems to do the trick to get a fluid mesh. Looks like cut-cell does not like it when the stl is exactly the same as the domain…
19.mfx (12.3 KB)
All your particles 
now.
What should I do if I want fluidizing gas enter the column through the slop?
You will have to place point sources along the slope.
What do you mean by along the slope. Does it mean i need to defined several points on the slop or I can just define a plane along the slop and set this slop as point source region? Will the gas leakage equally along the slop?
You can either manually define a few discrete point sources next to the slope, or use a mass inlet BC along the sloped planes (MFiX will distribute a series of point sources in the cells next to the sloped planes). To do that, you need to split the STL file into two sections (that’s a bit tricky). Please see attached.I picked an arbitrary mass flow rate along the sloped planes.
614.mfx (15.6 KB)
.
I got another case saying all the cells are blocked. This time I extended the Z direction and all the cells keep blocked regardless of the direction of normal.
This is the case.plates.zip (99.4 KB)