Now that the simulation has been completed, we need to post-process the file in order to visualise the results. In order to do so, we can use the built-in post-processing routines within Nektar++. In particular, we can use the following command
$NEKTUTORIALdirectory convert the .xml and .chk files into a .vtu format by calling
$NEK/FieldConvert Helm_mesh.xml Helm_conditions.xml Helm_mesh.fld
.vtufile that is a readable format for the open-source package Paraview or VisIt. Note that we typically have to specify both the mesh
.xmlfile and the condition
.xmlfile. We can now open the
.vtufile just generated. This produces the image in Fig. (4.1).