turtleFSI

Spec sheet

Purpose

turtleFSI is a monolithic fluid-structure interaction solver written in FEniCS for researchers and others investigating fluid-structure interaction problems.Read 12 Oct 2026 · github.com

Integrations

The documentation describes using ParaView to view simulation output and points users to FEniCS resources for meshing questions.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Security

The project pages reviewed do not state security certifications or compliance claims.Read 12 Oct 2026 · github.com

Support

The repository directs users to its GitHub issue tracker to report bugs and other issues.Read 12 Oct 2026 · github.com

License

The repository states that turtleFSI is licensed under GNU GPL version 3 or any later version.Read 12 Oct 2026 · github.com

Assessment tools

NoRead 23 Sep 2026 · turtlefsi2.readthedocs.io

Checkpointing

Built-in functionality supports saving checkpoints at a chosen frequency and restarting from a previous checkpoint.Read 5 Oct 2026 · turtlefsi2.readthedocs.io

Command line

Parameters can be controlled from the command line, and a specific problem file can be run with `turtleFSI --problem [path_to_problem]`.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Custom problems

Users define problem files with functions for parameters, mesh and boundary markers, boundary conditions, and optional simulation hooks.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Dependencies

The documentation lists FEniCS 2019.1.0, NumPy, and Python 3.7 or later as dependencies.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Distribution

The development version is available from the project’s GitHub repository and can be installed from source with `python setup.py install`.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Features

The solver includes checkpointing and restart support, plus saving files for visualization.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Installation

The project recommends Anaconda or Miniconda installation on macOS or Linux and building from source on HPC clusters.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Known issue

The documentation lists an issue page that includes a MUMPS failure error message topic.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Known limitation

For large problems, often 3D problems with many degrees of freedom and several tens of processors, the default MUMPS solver may fail, possibly because it lacks memory for the linear system.Read 5 Oct 2026 · turtlefsi2.readthedocs.io

Lesson library

NoRead 23 Sep 2026 · turtlefsi2.readthedocs.io

Mesh lifting

It provides mesh lifting options including Laplace and biharmonic methods, with biharmonic described as more robust for large deformations but more computationally expensive and memory intensive.Read 5 Oct 2026 · turtlefsi2.readthedocs.io

Parallel computing

The solver can run with MPI parallel tasks using FEniCS HPC functionality.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Simulation controls

Users can set simulation parameters from the command line and supply their own problem file.Read 5 Oct 2026 · turtlefsi2.readthedocs.io

Solver approach

The project describes turtleFSI as a fully monolithic solver using the classical arbitrary Lagrangian-Eulerian formulation.Read 5 Oct 2026 · joss.theoj.org

Visualization

Simulation output can include XDMF files for visualization in tools such as ParaView.Read 12 Oct 2026 · turtlefsi2.readthedocs.io

Where Specifiction places it

• Physics Simulation Software#84 of 896.9