Hello,
I’ve recently done a quick, qualitative comparison between DEM and PIC results for a simple, pseudo-2D fluidized bed using MFiX version 23.3.1. I’ve attached videos of the behavior of both systems.
As you can see, the difference in behavior is apparent. Compared to DEM, the bed of the PIC simulation is less fluidized and exhibits hindered bubble formation.
I fully understand that there will meaningful differences in how the two models behave, but I did not expect it to this degree, which makes me think there’s something wrong with my project setup for the PIC case. I’ve compared my setup of the .mfx file with some of MFiX’s PIC tutorial files and haven’t found any difference in setup that would cause erroneous behavior. I’ve attached the .mfx file for the PIC simulation in case that would be helpful to the support team (ignore the filename, it’s outdated). If this is expected behavior, please let me know. If not, please let me know what I should do to better set up my PIC simulation.
Thanks!
2108_hong_dem_recreation.mfx (13.8 KB)