FeenoX documentation index

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2025-03-29

Table of contents

Every bit of FeenoX documentation is written in Pandoc-flavored Markdown in the doc directory of the FeenoX repository. It is then converted to HTML, PDF, Unix manpage or Texinfo as needed. FeenoX documentation is released under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License.

1 Manual and description

As per the GNU Coding Standards, “a manual should serve both as tutorial and reference.” Due to the formatting restrictions, the Texinfo version contains only the description and not the full reference.

1.1 Design

  1. The FeenoX project starts as an offer to an imaginary “request for quotations” that defines software requirements specifications for an open source computational tool.

  2. Then a fictitious “offer” to the above tender is given in a software design specifications document that explains the design decisions and features included in FeenoX.

Why FeenoX works the way it works (i.e. why it does not run in Windows)

1.2 Other documents

1.3 Youtube videos

1.4 Markdown sources

The Markdown sources are in the doc:

They are compiled by running the make.sh script.

2 Hands on

Go directly to the point and see how to solve problems with FeenoX. Everything needed (input files, geometry files, meshes, data, scripts, etc.) is included in the FeenoX repository.

2.1 Examples

Annotated examples can be found in the examples directory of the Github repository.

2.2 Tutorials

  1. Setting up your workspace

2.2.1 General tutorials

  1. Overview: the tensile test case
  2. Fun & games: solving mazes with PDES instead of AI

2.2.2 Detailed functionality

  1. Input files, expressions and command-line arguments
  2. Static & transient cases
  3. Functions & functionals
  4. Vectors & matrices
  5. Differential-algebraic equations
  6. Meshes & distributions

2.2.3 Physics tutorials

  1. The Laplace equation
  2. Heat conduction
  3. Linear elasticity
  4. Modal analysis
  5. Thermo-mechanical analysis
  6. Neutron diffusion
  7. Neutron transport

2.3 Tests

The tests directory in the repository has hundreds of

  • grep-able examples,
  • unit tests,
  • regression tests, and/or
  • (crude) mathematical verification tests.

3 Contributing

3.1 Asking questions & reporting bugs

3.2 Contributing guidelines

Contributions from hackers and/or academics are welcome, especially new types of PDEs and new formulations of existing PDEs. For elliptic operators feel free to use the Laplace equation at src/pdes/laplace as a template.

  1. Read the Programming Guide.
  2. Browse Github discussions and open a new thread explaining what you want to do and/or asking for help.
  3. Fork the Git repository under your Github account
  4. Create a pull request, including
    • code,
    • documentation, and
    • tests.
  5. Follow up the review procedure.

Note that

  • It is mandatory to observe the Code of Conduct.
  • The contributed code has to be compatible with the GPLv3+ license.
  • Each author keeps the copyright of the contribution.
  • You can ask!

3.3 Adding a new PDE to src/pdes

To be explained.

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