[Ing.v.]

Hello,
it is my first post, I hope that I have respected the forum rules, if it doesn't, I apologize.
I try to be concise to explain my problem:

Study-case: Lagrangian Particle Tracking in a conduit.

Particles phase: solid.

Flow type: steady-state incompressible flow.

Study workflow: snappyHexMesh ----> simpleFoam ----> icoUncoupledKinematicParcelFoam.

Problem: mismatch between '' Current number of parcels '' and '' parcels added ''.
A certain number of particles disappears after the injection into the frozen steady-state flow but none of these leave the outlet (see attachment img1).
I believe that the problem is numerical, not physical, also because I have reliable data for both flow conditions and particles.

Attempts to solve:
1. modification of the time step size (increased/decreased);
2. modification of mesh refinement;
3. positive setting of minTet;
4. parallel computing disabled;
5. modification of the SOI, '' duration '' and '' flowRateprofile '';
6. modification of the particle diameter;
7. modification of the interaction distance;
None of these attempts have solved the problem.
I attach the output file (icoUncoupledKinematicParcelFoam) and the controlDict and kinematicCloudProperties dictionaries of the case study and I would like to ask your opinion because it is the first time that I use the Lagrangian, and I don’t know if it's a bug or if I am missing something.