Dt<dtmin when runing the mfix-dem

MFiX
#1

hello everyone,
i was runing the 2d-mfix-dem,and the error message came out with dt<dtmin,and i checked all of the parameters i set up, and i don’t know why,please help.
the file was uploaded.

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2dtest2_2022-09-29T204345.194184.zip (184.3 KB)

#2

Whenever you see DT < DT_MIN, it means that the model is not converging for some reason. If you look at the messages in the console, the solver indicates that a velocity inlet has exceed the MAX_INLET_VEL_FAC, which is 10 m/s.

So, I would check you BCs, make sure they are physical. Then, I would check the mesh to see if you have a small cell near one of the BCs that is causing the issue.