Figure 14.

Theory–experiment comparison for curves of shear stress versus shear rate, for sample 5Fe-15LVSA, under the application of magnetic fields of different strengths, H. Filled diamond, full curve, H = 156 kA m⁻¹; filled triangle, dashed curve, H = 282 kA m⁻¹. Filled diamond and filled triangle represent experimental data; full curve and dashed curve are predictions of the theoretical model (equation (4.12)). Parameters of the system for theoretical calculations: number of primary agglomerates in the undestroyed chains obtained by fitting are n = 8 and n = 9 for the magnetic fields of 156 kA m⁻¹ and 282 kA m⁻¹, respectively; volume concentration of clusters $\mathrm{\Phi }=0.25$ and viscosity ${\eta }_0=\sigma (H=0)/\dot{\gamma }$. (Online version in colour.)