Fig. 6
From: Random walk of passive tracers among randomly moving obstacles
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 a dipolar potential \(U=\bar {\mathcal {C}}l^{-3}\). Conventions on adimensional units are the same of Fig. 1. The curves refer to different values for potential strength: \(\,\bar {\mathcal {C}}_{Dip}=10^{2}\) (continuous line), \(\,\bar {\mathcal {C}}_{Dip}=10^{3}\) (dot-dashed line), \(\,\bar {\mathcal {C}}_{Dip}=10^{4}\) (dashed line), \(\,\bar {\mathcal {C}}_{Dip}=10^{5}\) (dotted line). The flat dashed line correspond to the case \(\bar {\mathcal {C}}_{Dip}=0\)