We will now focus on the study of the coordination number in the framework of the extruded microstructure. We selected a section of the microstructure (called "Sample 2" in Fig. ) of F1 inside the recirculation circuit at 70 M 𝛥𝑡 under the two different injection scenarios with 5000 rpm rotation speed. We chose the location of "Sample 2" because it allows us to study a wider area than "Sample 1", giving us a broader view of the particles' distribution. In Fig. , we show the coordination number of BC-BC particles and the Radial Distribution Functions (RDF) plots for AM-AM, AM-BC, and BC-BC. In views perpendicular to the z axis, we can see that in the sequential injection scenario, BC particles have large apparent clusters (larger red areas). In contrast, in the simultaneous injection scenario, particles show a greater alternation of compacted and non-compacted zones. It is evident from the RDF plots that the particle distributions obtained from the two injection scenarios are essentially similar. In both approaches, the particle pairs show peaks at almost the same distance in the range of 0 to 15 µm, which are 4.85 µm for BC-BC, 7.35 µm for BC-AM, and 9.95 µm for AM-AM. In addition, the peaks of BC-AM are higher than those of the other two, which suggests that the probability of the mixed arrangement of BC and AM particles is higher than that of the two kinds of particles aggregated into clusters on their own. Notably, the peaks all appear at locations smaller than the particle radii sum, suggesting a robust interaction and overlap between the particles. This is due to the narrow geometry of the pipe which limits the trajectory of the particles, and to the pushing force of the extruder rotation.