Figure 8.

The dependence of the reduced magnetic effective viscosity on magnetic field H inside the ferrofluid [68]. The diameter of the magnetic core of the ‘‘large’’ particles was $d_l=16.5$ nm, while their hydrodynamic volume concentration was ${\phi }_l=0.017$. The dots are experimental data, while the lines correspond to calculations: (a) $\dot{\gamma }=0.1 {\mathrm{s}}^{-1}$ (1), $0.5{ \mathrm{s}}^{-1}$ (2), and $0.9 {\mathrm{s}}^{-1}$ (3); (b) $\dot{\gamma }=1.05 {\mathrm{s}}^{-1}$ (1) and $5.23{ \mathrm{s}}^{-1}$ (2).