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xdmf-fe-filter

ParaView filter to read Finite Element data in XDMF format

Format

At present, the XDMF contains an Unstructured Grid, i.e. mesh topology and geometry, and two Attributes, which must be named as xxx_ELEMENT_idx and xxx_ELEMENT_val, where xxx is user defined, and ELEMENT is one of:

  • CG1, CG2
  • DG0, DG1, DG2
  • RT1

The xxx_ELEMENT_val Attribute is a 1D float array, and the xxx_ELEMENT_idx is a 2D UInt array, with index values for the nodal values in each cell. Hence the first dimension must be the same as the number of cells. In order to read correctly, use the Xdmf3 reader in ParaView.

A script generate.py is provided, which uses experimental XDMF output in FEniCS to generate the XDMF files.

Testing in ParaView

  1. Open the XDMF file with the Xdmf3 reader
  2. Add a filter "ProgrammableFilter" and in the box paste: execfile("fe-filter.py") - you may need to add the full path.
  3. Select the output field of the filter to display and process as usual

Future Work

Add support for more elements (higher order, BDM, etc) , and more cell types (e.g. 1D, quadratic meshes)