A mixture model for the dynamic of the gut mucus layer Tamara El Bouti, Thierry Goudon, Simon Labarthe, Béatrice Laroche, Bastien Polizzi, Amira Rachah, Magali Ribot and Rémi Tesson ESAIM: ProcS, 55 (2016) 111-130 Published online: 15 February 2017 DOI: 10.1051/proc/201655111