Hi Jeff,
Thank you very much for your case set for the layered fluidized bed last year. Now, I realized that starting from this case, we should be able to simulate a vibrated fluidized bed with the moving stl, which has been discussed in the forum before but not perfectly solved (Vibrating Lower Boundary – How to Implement? and Moving mesh capabilities?).
Layered_FB.mfx (13.4 KB)
usr_mod.f (773 Bytes)
usr0.f (2.8 KB)
usr1_des.f (2.5 KB)
I built the udfs as attached, and add vibration by calling Translate_STL(is_1_group_id, WALL_VIB) in usr1_des.f, where is_1_group_id is the stl at a vertical position of 0.2 m and WALL_VIB is a local variable used for the vibrating displacement. I have tried a frequency of 10 Hz and an amplitude 5 mm, which should be strong enough to make the particles move. However, I didn’t see any particles motions. Actually, I also tried even larger vibration amplitude, but none shows movements of particles or visually the movement of the vibrating layer. Could you help me look into this? Thank you very much!
I would also like to call @julia.hartig @ebreard6 because they may be also interested in this.