# Lagrangian Particle Filter

**URL:** https://discourse.paraview.org/t/lagrangian-particle-filter/10798
**Category:** ParaView Support
**Tags:** vtk
**Created:** [November 18, 2022, 12:41am UTC](https://discourse.paraview.org/t/lagrangian-particle-filter/10798 "2022-11-18T00:41:10Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![vrkssai](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/v/e19b73/32.png) [@vrkssai](https://discourse.paraview.org/u/vrkssai)
#### Post date: [November 18, 2022, 12:41am UTC](https://discourse.paraview.org/t/lagrangian-particle-filter/10798/1 "2022-11-18T00:41:10Z")

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Hi  
I’m using the vtkLagrangianParticleTracking plugin on paraview and was wondering if I could find more information on the plugin. I would like to more about the equations/physics behind the implementation and corresponding controls we have access to through paraview. Especially, if gravity, drag, etc was implemented.

Also I notice that while plotting the lagrangian particle path on flow field changing in time, it shows the path at any given instant. Is this path integrated over time?

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [November 18, 2022, 1:13pm UTC](https://discourse.paraview.org/t/lagrangian-particle-filter/10798/2 "2022-11-18T13:13:59Z")

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Hi @vrkssai

Well, I developped it.

Blog article: [https://www.kitware.com/vtk-and-paraview-add-highly-configurable-particle-tracker/](https://www.kitware.com/vtk-and-paraview-add-highly-configurable-particle-tracker/)  
Further discussions: [LagrangianParticleTracker example file](https://discourse.paraview.org/t/lagrangianparticletracker-example-file/571)  
Matida model implementation: [https://gitlab.kitware.com/vtk/vtk/-/blob/b2febcff1cd9c2ef33905673ab48784e9dc8bc33/Filters/FlowPaths/vtkLagrangianMatidaIntegrationModel.cxx#L150](https://gitlab.kitware.com/vtk/vtk/-/blob/b2febcff1cd9c2ef33905673ab48784e9dc8bc33/Filters/FlowPaths/vtkLagrangianMatidaIntegrationModel.cxx#L150)  
Matida model article: [https://www.sciencedirect.com/science/article/abs/pii/S0021850203003811?via%3Dihub](https://www.sciencedirect.com/science/article/abs/pii/S0021850203003811?via%3Dihub)

The matida model indeed support gravity and drag.

> Is this path integrated over time?

No, temporal support is not implemented in the LPT