Under certain circumstances, when injecting particles using the 'Discrete Diameter Distribution' option, an incorrect number of tracks are injected for the specified size bands.
For example, in a particular case with 10 size bands, if a total of 200 tracks are started, then as expected there are 20 tracks per size band. However, if 400 tracks are started, there are 39 tracks in each of the first 9 size bands and 49 tracks in the final size band.
This is due to a rounding error in the particle diameter distribution routines within the CFX Solver.
No workaround is currently available.