@nholzschuch@antoinechambertloir@jaztrophysicist my French isn't great, but yeah, the 'normal' way people would simulate something like this would be solving Navier-Stokes throughout the liquid volume, using a geometric surface representation that can deform and change topology )like particles or a mesh or signed distance field). The physics would be, as you said, Navier-Stokes (pressure, viscosity, advection) with surface tension on the surface.