Figure 3

Validation of the numerical scheme. Top: Initial topography as measured using the Phasics™ interferometric microscope. Bottom: Solution at $t=600$, analytical (left) and numerical (right). Each image corresponds to the same $3.52\times 3.52{\text{mm}}^2$ domain decomposed into $27.5\times 27.5{\mu \text{m}}^2$ subdomains or pixels, over which the altitude is averaged (color coding).