I’ve been testing a simple 2D TFM case, which is a modification of the tutorial 2D TFM case where I changed the particle diameter and density. During my tests, I noticed that after the flow time reaches more than ten seconds, there still appears to be a problem where DT < DT_MIN.
After more than ten seconds of fluidization, we usually assume that the fluidization has stabilized. I don’t understand why this issue persists at this stage. Could someone help me understand this? What adjustments should I make to resolve this issue?
Here is the case file I used. As you can see from the screenshots, the simulation has run for a considerable amount of time, but it eventually diverged.
I am not able to reproduce, it ran to completion for me. Please try to do a restart from the last restart point to see if you can get by the time it failed. You can also try to reduce dt_min. Set full_log=.true. to see which residual is having a hard time converging.
