# particle tracking

**URL:** https://discourse.paraview.org/t/particle-tracking/5981
**Category:** ParaView Support
**Created:** [December 4, 2020, 2:13pm UTC](https://discourse.paraview.org/t/particle-tracking/5981 "2020-12-04T14:13:58Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![ValeRomano](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/v/eb9ed0/32.png) [@ValeRomano](https://discourse.paraview.org/u/ValeRomano)
#### Post date: [December 4, 2020, 2:13pm UTC](https://discourse.paraview.org/t/particle-tracking/5981/1 "2020-12-04T14:13:58Z")

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Hi,  
I have multiple (hundreds) .inp files relative to particle trajectories at different time steps. I’m trying to import them all together in Paraview, since are too many. However, I’m not able to display them.

How can I solve this? is there a specific way to visualize multiple files?

Thank you,  
Valentina

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### Author: ![Kenichiro-Yoshimi](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/ecc23a/32.png) [@Kenichiro-Yoshimi](https://discourse.paraview.org/u/Kenichiro-Yoshimi)
#### Post date: [December 7, 2020, 4:11am UTC](https://discourse.paraview.org/t/particle-tracking/5981/2 "2020-12-07T04:11:18Z")

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Hello,

To make ParaView recognize the files as a file series, they need to be named in a specific patterns including:

- foo0.inp, foo1.inp, …
- foo\_0.inp, foo\_1.inp, …
- foo-0.inp, foo-1.inp, …
- foo.0.inp, foo.1.inp, …

Then the ParaView open file dialog should look like “foo…inp”. To visualize a file series, simply select the group “foo…inp” and click ok.