Particles go out of the reactor when using MFIX-CGP model

MFiX
#1

Hello everyone. When I use the CG-DEM model in MFIX to simulate a mini CFB reactor, the particles always go out of the reactor. My mfix files are attached.

image
image640×576 143 KB

CFB.mfx (20.7 KB)
geometry.stl (8.6 MB)
geometry_0001.stl (521.0 KB)
geometry.stl (8.6 MB)

The software does not report an error, but automatically stops running
#2

Please try to increase the spring stiffness: 12. Frequently Asked Questions — MFiX 22.3 documentation