multiphenics was a python library that aimed at providing tools in FEniCS for an easy prototyping of multiphysics problems on conforming meshes. In particular, it used to facilitate the definition of subdomain/boundary restricted variables and enabled the definition of the problem by means of a block structure.

multiphenics was developed by Dr. Francesco Ballarin, currently at Università Cattolica del Sacro Cuore, in collaboration with Prof. Gianluigi Rozza's group at SISSA mathLab. The financial support of the AROMA-CFD ERC CoG project was gratefully acknowledged.

New and existing users of FEniCS are encouraged to move to FEniCSx forthwith. The multiphenicsx library, which is currently developed and maintained, targets FEniCSx, and effectively replaces multiphenics.

Like all core FEniCS components, multiphenics was freely available under the GNU LGPL, version 3.