Visualising Meshes¶

You can then convert Nektar++ meshes to the VTK format to make them suitable for visualisation. For example, if you have a mesh in the file test_geometry.xml:

FieldConvert test_geometry.xml test_geometry.vtu:vtu:highorder

Note that this requires Nektar++ to have been compiled with VTK support. If it has not, approximate meshes can still be produced using:

FieldConvert test_geometry.xml test_geometry.vtu

In that case, additional elements will be added to approximate the higher-order shape of the element. This results in larger files and uglier visualisations, though.

You can then open the result .vtu file with ParaView in order to display it. To see individual elements of the mesh, select to view it as either “Surface With Edges” or “Wireframe”. Examples of visualations using ParaView are given throughout this tutorial.