I used MFIX-21.4 to simulate fluidized bed, and there was no problem in 2d simulation, but when I changed the model into 3D, “DT < Dt_min. Recovery not possible” appeared. I know that means that there’s no convergence, And also, in accordance with the user manual at https://mfix.netl.doe.gov/doc/mfix/21.4/html/reference/faq.html#what-do-i-do-if-a-run-does-not-converge But it still doesn’t solve the problem. Any useful help will be appreciated.
3D.zip (2.9 MB)
(previous reply deleted)
I’m seeing a bunch of these warnings:
Velocity exceeds limit: 25.000
in cell: I = 7 J = 28 K = 4
Epg = 0.41729 Ug = -0.56640E-09 Vg = 25.895 Wg = -6.0625
To change the limit, adjust the scale factor MAX_INLET_VEL_FAC.
Try searching the forum for MAX_INLET_VEL_FAC