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Watch a 63-minute seminar presentation by Sergey Gavrilyuk from Aix Marseille Université exploring new conservation laws in dispersive continuum mechanics. Delve into the mathematical analysis of Euler–van der Waals–Korteweg's fluids, fluids containing small gas bubbles, and long-free surface gravity waves through Serre-Green-Naghdi equations. Learn about the discovery of helicity invariant analogs in these systems, presented as part of the "Dispersive hydrodynamics: mathematics, simulation and experiments, with applications in nonlinear waves" event at INI. The research, conducted in collaboration with Henri Gouin, advances our understanding of conservation principles in complex fluid systems.