Ambit – A FEniCS-based cardiovascular multi-physicssolver

Ambit is an open-source multi-physics finite element solver written in Python, supporting solid and fluid mechanics, fluid-structure interaction (FSI), and lumped-parameter models.It is tailored towards solving problems in cardiac mechanics, but may also be used for more general nonlinear finite element analysis.The code encompasses re-implementations and generalizations of methods developed by the author for his PhD thesis (Hirschvogel, 2019) and beyond.Ambit makes use of the open-source finite element library FEniCS/dolfinx (Logg et al., 2012) along with the linear algebra package PETSc (Balay et al., 2022), hence guaranteeing a state-of-the-art finite element and linear algebra backend.It is constantly updated to ensure compatibility with a recent dolfinx development version.I/O routines are designed such that the user only needs to provide input files that define parameters through Python dictionaries, hence no programming or in-depth knowledge of any library-specific syntax is required.