[belenscita86]

Dear everyone.
I am working on a pipe crystallizer of dimensions 5mm of radius and 1m long. I am working on the cooling crystallization of KCl and I am using population balance (discrete) and Euler models to obtain the size distribution. However, I have a problem stating the inlet boundary conditions. In the inlet I have flow with a velocity of 0.1 m/s and I dont have crystals, therefore I inserted in my boundary conditions 0 as volume fraction of crystal phase and 0 as the bin fraction of all clases (30bins). I have been trying to solve my simulation but residuals in the bin fractions equations start as zero and dont change during the calculation, which is rare and it might indicate that the equations are not being solved. In addition, I have an error that states "Error: temperature limited to xxx in XX cells.
I have checked tutorials and the manual but I can not seem to find how to set up the bin fraction boundary conditions, there is not much information on this. Should I get this information from experimental conditions? Since obtaining size distribution is my primary goal how can I provide details of this parameter to the software? If I state one of the bin fractions as 1 it means that in the boundary (inlet) all the particles lie in that size range?

Attached you can find a residuals plot of my simulation.
Any help will be greatly appreciated