Mesh output files

Contents

Mesh output files#

FELiCS exports the computational mesh used for solution and mean-flow outputs as:

mesh.h5

The file uses the HDF5 format and stores:

  • mesh coordinates,

  • element connectivity.

Typical datasets include:

/cells/triangles
/coordinates/x
/coordinates/y

The file is exported in the output directory defined by the Export.ExportFolder parameter.

Export mesh#

FELiCS computations typically rely on finite-element spaces combining:

  • first-order (P1) elements,

  • and second-order (P2) elements.

However, the export module from FELiCS expects fields to be defined on first-order meshes.

To ensure compatibility, FELiCS constructs an export mesh consisting only of first-order triangular elements.

For second-order (P2) finite-element spaces, this is achieved by refining the original computational mesh so that all second-order degrees of freedom become vertices of a first-order export mesh. This is illustrated below:

P2 to P1 export mesh

As a result:

are both defined on this FELiCS export mesh rather than directly on the original computational mesh.

Contents