Morphological characterization of liquid-gas interface

The work reported in this paper focuses on the description and characterization of liquid flows in a gaseous environment such as those undergoing an atomization process. The objective here is to describe the complex forms encountered in order to study their dynamics on the basis of new indicators. Completing a work presented at ILASS-Europe 2019 (Paris), the concept of parallel surfaces is convened and extended to all scales of liquid systems. This approach leads to the identification of specific scales. By way of illustrations, this multi-scale description is applied to synthetic systems as well as to the case of the Rayleigh-Plateau instability.