FIG. 13 :
13(Color online) (a) Structure factor of the front, S(k, t), as a function of wave-vector modulus k for increasing times as indicated by the color scale, from numerical simulations of Eq. (16) using parameters as in Fig. 12. (b) Collapse of the **data** of panel (a) following Eq. (12). The u-independent behavior at large u = kt 1/z indicates standard FV scaling with α = α loc 1. All units are arbitrary. FIG. 14: (Color online) (a) PDF of front fluctuations as obtained from numerical simulations of Eq. (16) using parameters as in Fig. 12, for t = 10 −2 (green points) and for t = 2621.44 = 2 18 · 10 −2 (red points). The dashed line shows a Gaussian distribution while the solid line corresponds to the exact TW-GOE form. Inset: time evolution of the skewness and excess kurtosis corresponding to the same set of simulations as the main panel. The TW-GOE values are the abscissas of the corresponding horizontal lines and are shown for reference. (b) Data collapse according to Eq. (15) for the same simulations as in panel (a). For reference, the exact Airy1 covariance is shown as a dashed line. All units are arbitrary.