Fig. 7: Shear-rate dependence of the viscosity in the Gaussian core model (GCM).

a \(\eta (T,\dot{\gamma })\) is plotted as a function of \(\dot{\gamma }\), and b \(\eta (T,\dot{\gamma })/{\eta }_{0}(T)\) is plotted as a function of \(\dot{\gamma }/{\dot{\gamma }}_{c}\). Symbols of different colors represent values at different T; T × 10⁶ = 10.0 (yellow), 7.0 (purple), 5.0 (green), 4.0 (cyan), 3.4 (orange), 3.2 (blue), 3.0 (red), and 2.9 (black). In a, closed symbols indicate the equilibrium values η₀(T). Black line indicates \(\eta ={\eta }_{0}\propto {\dot{\gamma }}^{0}\), whereas blue line indicates \(\eta \propto {\dot{\gamma }}^{-\nu }\) with ν ≃ 0.73. Note that the blue line, which is well fitted to data on τ_α and D⁻¹, does not work for η. In b, the vertical dotted line indicates the location of \({\dot{\gamma }}_{c}\).