# particle doesn't back to the original place in cyclic boundary
**URL:** https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296
**Category:** ParaView Support
**Created:** [May 11, 2020, 6:22am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296 "2020-05-11T06:22:59Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [May 11, 2020, 6:22am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/1 "2020-05-11T06:22:59Z")
Hi everyone,
I am running a simulation with one pair cyclic boundary but the particle after passing one cyclic side doesn’t reappear again but t but I can see the shadow of the velocity field on another side as well. is there any setting in Paraview that could solve the problem
kind regards,
Arghavan
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 11, 2020, 7:27am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/2 "2020-05-11T07:27:28Z")
please include screenshot of the issue.
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [May 11, 2020, 8:11am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/3 "2020-05-11T08:11:54Z")
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 11, 2020, 8:32am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/4 "2020-05-11T08:32:36Z")
I’m confused what is the issue here, but in any case, the issue must probably be in your simulation, not in ParaView.
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [May 11, 2020, 8:33am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/5 "2020-05-11T08:33:27Z")
I see, okay. thank you.
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [May 11, 2020, 8:50am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/6 "2020-05-11T08:50:37Z")
The issue is in cyclic boundary usually the particle after passing one side of the cyclic side should back to the original position but in my case particle doesn’t back to the original place.
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### Author:  [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [May 11, 2020, 1:54pm UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/7 "2020-05-11T13:54:44Z")
@Arghavanizad I think we are confused about what you are doing with ParaView and what you expect to happen. From your screenshot, it looks like you are opening two `open.foam` files and then hitting `Play` to watch an animation of particles in these files.
If this is what you are doing and the particles are not going where you expect them to, then the problem is with your simulation. ParaView is just showing you what the simulation provided. If the simulation is not respecting cyclic boundaries, then you will have to ask for help in the forum for that simulation.
By the way, if you want to take a screenshot of Windows, consider using the `Snip` program, which comes with Windows. It is easier and makes a clearer image than taking a picture of the screen. (See [this Windows support article](https://support.microsoft.com/en-us/help/13776/windows-10-use-snipping-tool-to-capture-screenshots) for more details.)
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [May 25, 2020, 10:01am UTC](https://discourse.paraview.org/t/particle-doesnt-back-to-the-original-place-in-cyclic-boundary/4296/8 "2020-05-25T10:01:02Z")
yes, you are right. now the problem solved.