Figure 4.

Wave velocity and scaling relation. Wave velocity for different values of D$\left(\overline{J}=25.5\right)$ and k₀ so that we span a large range of $\overline{J}/D$ values between 1.7 and 12.7. Values of D are given in simulation units (i.e., in units of $\mathit{\Delta }{x}^2/\mathit{\Delta }t$). Simulation data are well fitted by a straight line (orange), whereas the simple scaling theory discussed in the text underestimates the data slightly (dashed black line). To see this figure in color, go online.