[Paraview] moving streamlines with flow

[Jan Deca]

Hello,

I am running simulations of magnetized plasma flow through a 
computational domain. In the simulation the magnetic field lines are 
moving with the flow. When generating an animation over different time 
steps (frames), however, the streamtracer uses the same seeds for each 
frame, and hence the resulting impression is that the field lines do not 
move in time.

Would anybody have an idea on how to accomplish moving field lines?

Thank you!

Jan