A splitting method adapted to the simulation of mixed flows in pipes with a compressible two-layer modelCharles Demay, Christian Bourdarias, Benoît de Laage de Meux, Stéphane Gerbi and Jean-Marc HérardESAIM: M2AN, 53 2 (2019) 405-442DOI: https://doi.org/10.1051/m2an/2018051