%O © 2014 Académie des sciences. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %X The aim of this work is to justify mathematically the derivation of a viscous free/congested zones two-phase model from the isentropic compressible Navier-Stokes equations with a singular pressure playing the role of a barrier. %L discovery10045146 %J Comptes Rendus Mathematique %D 2014 %P 685-690 %N 9 %V 352 %A D Bresch %A C Perrin %A E Zatorska %T Singular limit of a Navier-Stokes system leading to a free/congested zones two-phase model