Associating Time to Data in order to Animate

It’s hard to say without more details. Please attach a file (one timestep is fine) with the vel vector field.

Unrelated, please open your own thread.

In any case, you need to rename your file something like :

  • VTK_Praview_1.vtk
  • VTK_Praview_2.vtk

And then open the file series instead of opening the individual files.