EXISTENCE OF GLOBAL WEAK SOLUTIONS FOR COMPRESSIBLE FLUID MODELS WITH A CAPILLARY TENSOR FOR DISCONTINUOUS INTERFACES

Abstract : This work is devoted to proving the global existence of weak solutions for a general isothermal model of capillary fluids derived in his modern form by C. Rohde in [21], which can be used as a phase transition model. First, inspired by the result by P.-L. Lions in [19] on the Navier-Stokes compressible system we show the global stability of weak solutions for our system with isentropic pressure and next with general pressure. Finally, we consider perturbations of a stable equilibrium.