2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49700Using the Poisson bracket method, we construct the hydrodynamics of nuclear matter in the chiral limit, which describes the dynamics of all low-energy degrees of freedom, including the fluid-dynamical and pionic ones. The hydrodynamic equations contain, beside five Euler equations of relativistic fluid dynamics, Nf^2-1 second order equations describing propagating pions and Nf^2-1 first order equations describing the advection of the baryonic vector isospin charges. We present hydrodynamic arguments showing that the pion velocity vanishes at the second order phase transition at Nf=2.9 pages; small improvements. Version published in PRLHigh Energy Physics - PhenomenologySoft Condensed MatterChaotic DynamicsNuclear TheoryFluid Dynamicstext