Keyframing Force Reinjection Every N Steps on Particle Tracer disappearing particles

ParaView Support
1

Hello,
I am attempting to mimic an injection and wash cycle of particles in a volume. That is, particles are reinjected every timestep up to a point, reinjection stops, then existing particles continue to be advected. I have created a Particle Tracer and in the Time Manager added ForceReinjectionEveryNSteps. Attached is a screenshot of the pipeline and Animation Keyframes dialog.

keyframing_reinjection_pipeline_setup
keyframing_reinjection_pipeline_setup2249×1300 270 KB

For the first 6 timesteps new particles are injected. At this point there are ~6000 particles.

keyframing_reinjection_up_to_keyframe
keyframing_reinjection_up_to_keyframe1619×1306 262 KB

On the 7th timestep, the particles stop reinjecting as expected, but the majority of them disappear, which is unexpected and not what I need.

keyframing_reinjection_at_keyframe-missing_particles
keyframing_reinjection_at_keyframe-missing_particles1619×1306 240 KB

Any thoughts on what is happening here?

Thanks,
Mark

2

Hi @mvanmoer

Please share your data and ideally a state file.

Best,

3

Hi Mathieu,

https://uofi.box.com/s/66g47xuczkqzcdjrc5dsau8ahxbepj0z

Thanks! edit - I’m using ParaView 5.12.0

4

I have a partial workaround:

  1. Separate just the injection cycle timesteps
  2. Create the same pipeline as above and Save Data (or Save Geometry)
  3. Use the .vtp of the last injection timestep as a seed source for the wash cycle

This shows the advection that I was aiming for, but there doesn’t seem to be a way to take the ParticleAge from the injection and use that as an offset during the wash.