Sampling moiré technique and the dynamics of a spreading droplet on a solid surface

The rich physics of the fluid dynamical phenomena at the scale of capillary length needs novel techniques for experimental investigations. We have examined the recently developed method of sampling moiré for a problem in the area of fluid dynamics. We have experimentally quantified the dynamics of a droplet in the spreading regime, where the well known scaling results for the dynamics are expected from the theory of fluid dynamics. The simplicity of the method allows us to study and see a very good comparison between our experimental data and the theoretical results. (paper)