Figure 6

(a) Relationship between the slope of the aggregation rate (S) and Re1/3Sc when CeO2 NPs move through mono-disperse and bi-disperse sphere packings. Each point represents the S value of one simulation. (b) The comparison chart between aggregation rates obtained by simulations and those computed by Eq. (14). The black line in the chart is the unity line and each point is the aggregation rate at certain values of Re, Sc numbers, and time ranging from 50 to 500 PV with the increment of 50 PV.