We characterized the microstructure of the filament, at Sample 1, every 1 M 𝛥𝑡 and then determined its porosity, tortuosity factor, effective diffusivity, and electrical conductivity by using the voxel-based simulation software GeoDict ® . We are using these descriptors to characterize the filament microstructure, even if in a real extruder, a relaxation of the microstructure coming out from the extruder happens while it cools down in contact with the ambient air, a phenomenon that we are not taking into account in this model. These microstructure bulk properties change throughout the residence time of the particles in the system. For a simulation, we observed that the in situ properties can fluctuate significantly at the start of the simulation, but they tend to converge towards a slightly oscillating value, the average of which can be considered an approximation of the long-term, stabilized value of these properties. Thus, the different setups will be compared, by comparing these stabilized long-term average values of the post-treated properties from the various simulations.