# Removing part of the model (Remove particles within model)

**URL:** https://discourse.paraview.org/t/removing-part-of-the-model-remove-particles-within-model/6301
**Category:** ParaView Support
**Created:** [January 26, 2021, 10:00am UTC](https://discourse.paraview.org/t/removing-part-of-the-model-remove-particles-within-model/6301 "2021-01-26T10:00:00Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![shahrokh](https://discourse.paraview.org/user_avatar/discourse.paraview.org/shahrokh/32/5774_2.png) [@shahrokh](https://discourse.paraview.org/u/shahrokh)
#### Post date: [January 26, 2021, 10:00am UTC](https://discourse.paraview.org/t/removing-part-of-the-model-remove-particles-within-model/6301/1 "2021-01-26T10:00:00Z")

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Hello Dear Developers and Users

As shown in the following figure; I have two models with the names of **particlesSystem.vtk** and **ROI.vtk** (Spherical shape).

 ![1](https://discourse.paraview.org/uploads/default/original/2X/1/10a56e93cb6c39255cf798d9bb62b93472c493a8.jpeg)

I want to do two steps:

Step #1- Extract particles within ROI (It is OK)

Step #2- Remove these extracted particles from particlesSystem.vtk.

As shown in the following figure, I can do the first step using _Extract Enclosed Points_ filter.

 ![2](https://discourse.paraview.org/uploads/default/original/2X/4/48e79a611e42639d5d571be858c5f98bfe620619.png)

How can I do the second step? What filter should I use? I want to remove the particles extracted from particleSystem node.

Please guide me.  
Best regards.  
Shahrokh

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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: [January 26, 2021, 10:04am UTC](https://discourse.paraview.org/t/removing-part-of-the-model-remove-particles-within-model/6301/2 "2021-01-26T10:04:59Z")

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Check the “Generate Outliers” checkbox and use the outliers output.

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### Author: ![shahrokh](https://discourse.paraview.org/user_avatar/discourse.paraview.org/shahrokh/32/5774_2.png) [@shahrokh](https://discourse.paraview.org/u/shahrokh)
#### Post date: [January 26, 2021, 10:24am UTC](https://discourse.paraview.org/t/removing-part-of-the-model-remove-particles-within-model/6301/3 "2021-01-26T10:24:41Z")

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Dear Mathieu

Thank you very much for your guidance.  
Best regards.  
Shahrokh