The convergent problem on cylindrical coordinate

MFiX
#1

Hi, everybody.
I try to simulate a annular fluized bed by cylindrical coordinate. And I use the tutorial example (3dFluidbed, 3dFluidbed.mfx (2.4 KB) ) setting, it works well. The mesh picture is

2
21170×524 22.7 KB

However, the problem occured when I modified the set by hollowing the fluized bed. Here is the setting,annularfb.mfx (3.9 KB) . And, the mesh,
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11170×524 117 KB
.
Whatever the numerical set I used, the simualtion will fast divergent. The report,BUB02.LOG.txt (38.0 KB)

Is there suitable setting to make the simulation convergent?

EX: The hollow fluized bed seem not support higher cores parallel at nodei and nodez.