Issue in outputs from Geometry bins

Hrishikesh

Hi,
I have been having issues where the measured PSD from the two bins that have been set up does not make sense.
I have a chute that splits into two around a screen. I have placed two geometry bins around the opening before the chute to check the PSD of the material falling into the screen, and one to measure the PSD of the material that is rejected by the screen. When post-processing the output in the EDEM Analyst window using the histogram feature, it appears that more larger lumps are being rejected compared to what is actually being processed. For example, if there are 70 particles the size of 500mm entering the chute, then there are 110 particles of size 500mm being rejected by the screen and falling through the branched chute. So, there is a mismatch between the number of materials going in and leaving. (No breakage of material)

I am not sure if it's because of the time step at which the value is being recorded or if there is genuinely a bug in the programme.
I am currently using the 2025 version of EDEM and was hoping someone in the community would have a solution or an answer for why this has been occurring.

Thanks and regards,

Rishi

Stephen Cole

Just adding a note that this case was resolved via support.

As a general note on EDEM bin groups they record instantaneous data on what is inside the bin, and this is shown every data save point (not every time-step). So for post-processing the bins need to be large enough that the particles are inside for more than 1 save point to ensure they are captured.

That way however the particles could be counted twice, so there are additional options in the analysis such as 'total over time' which counts the cumulative mass entering a bin, particles inside more than 1 time-step are only counted once if total over time is used.