Fig. 13.

Speed of convergence of K_b. (A) Convergence of the mean value of ${\overline{K}}_B^{(r)}=(K_B^{(r)}+K_B^{(r-1)})/2$, where i is current iteration; (B) convergence of the change K_b value between two consecutive iterations $\mathrm{\Delta }{K}_B/{\overline{K}}_B^{(r)}=2(|K_B^{(r)}-K_B^{(r-1)}|)/(K_B^{(r)}+K_B^{(r-1)})$. Mean value of K_b converges to 7.07. The speed of convergence rapidly increases with decrease of ε and the value of $\mathrm{\Delta }{K}_B/{\overline{K}}_B^{(r)}$ settles at about 0.1% (see inset in A). The ripples are caused by the numerical instabilities at low values of ε. All fixed parameter values are the same as in Fig. 11.