Fig. 5

Normalized diffusion coefficient D/D ₀, computed with Eqs. (41) and (42), for A-type particles vs. intermolecular average distance d of B-type particles (expressed in adimensional units). The B-type particles interact through the Coulombic potential \(U=\bar {\mathcal {C}}l^{-1}\). Conventions on adimentional units are the same of Fig. 1. The curves refer to different values of potential strength: \(\bar {\mathcal {C}}_{Coul}=10^{2}\) (continuous line), \(\,\bar {\mathcal {C}}_{Coul}=10^{3}\) (dot-dashed line), \(\,\bar {\mathcal {C}}_{Coul}=10^{4}\) (dashed line), \(\,\bar {\mathcal {C}}_{Coul}=10^{5}\) (dotted line). The flat dashed line correspond to the case \(\bar {\mathcal {C}}_{Coul}=0\)