FEniCS / basix

FEniCSx finite element basis evaluation library
https://fenicsproject.org
MIT License
89 stars 34 forks source link
basis-functions fenicsx finite-elements high-order

Basix

Basix CI Spack install DefElement verification

Basix is a finite element definition and tabulation runtime library. Basix allows users to:

Basix includes a range of built-in elements, and also allows the user to define their own custom elements.

Basix is one of the components of FEniCSx, alongside UFL, FFCx, and DOLFINx.

Installation

To install Basix:

pip install fenics-basix

We currently build binary wheels for Python 3.8 to 3.12 for Linux (x86-64, aarch64), macOS (x86-64, arm64) and Windows (x86-64).

For advanced and developer installation instructions see the more detailed install instructions

Documentation

Documentation of Basix can be found at https://docs.fenicsproject.org/basix/main/.

Support

If you find a bug in Basix, you can report it on the GitHub issue tracker.

Questions about using Basix can be asked on the FEniCS discourse group.

Contributing

Information about how to contribute to Basix can be found here.

Supported elements

Interval

In Basix, the sub-entities of the reference interval are numbered as follows:

The numbering of a reference interval

The following elements are supported on an interval:

Triangle

In Basix, the sub-entities of the reference triangle are numbered as follows:

The numbering of a reference triangle

The following elements are supported on a triangle:

Quadrilateral

In Basix, the sub-entities of the reference quadrilateral are numbered as follows:

The numbering of a reference quadrilateral

The following elements are supported on a quadrilateral:

Tetrahedron

In Basix, the sub-entities of the reference tetrahedron are numbered as follows:

The numbering of a reference tetrahedron

The following elements are supported on a tetrahedron:

Hexahedron

In Basix, the sub-entities of the reference hexahedron are numbered as follows:

The numbering of a reference hexahedron

The following elements are supported on a hexahedron:

Prism

In Basix, the sub-entities of the reference prism are numbered as follows:

The numbering of a reference prism

The following elements are supported on a prism:

Pyramid

In Basix, the sub-entities of the reference pyramid are numbered as follows:

The numbering of a reference pyramid

The following elements are supported on a pyramid: