I would like to build gas inlets whose velocity varies with time. In fact, I have checked the relevant methods in the forum and have implemented this in the TFM model (fluid_bed_tfm_2d2_2023-04-10T064256.958756.zip (738.3 KB)).
However, when I tried to implement this in the DEM simulation, I ran into a problem. According to the monitors at the two gas inlets and one gas outlet, the inlet velocity seems to be consistent with the setup(bc_v_g(1)=0+0.3* time; bc_v_g(2)=0+0.3* time), but the gas outlet velocity is much higher than the imposed inlet velocity.
In addition, the particle outlet range far exceeded the given particle outflow boundary range. This is very confusing to me. Could you please give some advice on this? Thank you very much!
Here is the DEM case file where the problem occurs.
fluid_bed_counterflow_2023-04-10T062731.442982.zip (144.7 KB)