It is difficult to compare the advantages and disadvantages of the two injection scenarios from the distribution of particles at the same given time. However, by combining the data in Table , we can see that after a long time of simulation, the mixing efficiency of particles is higher under the simultaneous injection scenario. The tortuosity factor, effective diffusivity, and electrical conductivity of the filaments corresponding to the four materials formulations under the simultaneous injection scenario are more favorable results than those under the sequential injection scenario. A recent experimental work on the SF process also discussed how the injection sequence can modify the way materials agglomerate, particularly when mixing several materials, bearing in mind that some materials are more likely to agglomerate than others. Although we only consider two types of particles in our model, our simulation results are consistent with the conclusion of this experimental work, showing that mixing all particles at the same time produces a better mixing effect.