In the experiment of Boudeville et al. , the scanning electron microscopy (SEM) images of the extruded filament sample, which are squeezed out of the extruder, indicated a complex relationship between LFP and other mixed materials. It also showed that the diameter distribution range of the LFP aggregates in the extruded filaments ranges from 0.3 µm to 20 µm. To simplify the particle size distribution in the model, we assume a diameter of 10 µm for the AM particles.