A phase inversion benchmark for multiscale multiphase flows

A series of benchmarks based on the physical situation “phase inversion” between two immiscible liquids is presented. These aim at progressing towards direct numerical simulation two-phase flows. Several CFD codes developed in French laboratories and using either Volume-of-Fluid or Level-Set interface tracking methods are used to provide solutions benchmarks, convergence studies code comparisons. Two typical configurations retained, with integral scale Reynolds numbers 1.37104 4.33105, respectively. The physics problem probed through macroscopic quantities such as potential kinetic energies, enstrophy. In addition, scaling laws for temporal decay energy derived check relevance simulations. Finally droplet size distribution probed. Additional test problems also reported estimate influence viscous effects vicinity interface.