# understand the time-evolution of some variables by using plot Data over time

**URL:** https://discourse.paraview.org/t/understand-the-time-evolution-of-some-variables-by-using-plot-data-over-time/13622
**Category:** ParaView Support
**Created:** [December 26, 2023, 7:12am UTC](https://discourse.paraview.org/t/understand-the-time-evolution-of-some-variables-by-using-plot-data-over-time/13622 "2023-12-26T07:12:56Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Rohit\_Singh](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rohit_singh/32/13253_2.png) [@Rohit\_Singh](https://discourse.paraview.org/u/Rohit_Singh)
#### Post date: [December 26, 2023, 7:12am UTC](https://discourse.paraview.org/t/understand-the-time-evolution-of-some-variables-by-using-plot-data-over-time/13622/1 "2023-12-26T07:12:56Z")

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Hello,

I have performed a transient simulation in fluent and stored the data in .cgns format after every 1 sec. So, i have stored 100 such .cgns files for 100 s simulation data. My objective of recording the data in .cgns file is to understand the time-evolution of some variables by using plot Data over time filter in paraview. However, i am unable to look all time instants at same time in paraview. It would be very useful if you can help me on this.

Thanks

Rohit

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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 2, 2024, 8:59am UTC](https://discourse.paraview.org/t/understand-the-time-evolution-of-some-variables-by-using-plot-data-over-time/13622/2 "2024-01-02T08:59:00Z")

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Please share your data @Rohit_Singh

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### Author: ![Rohit\_Singh](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rohit_singh/32/13253_2.png) [@Rohit\_Singh](https://discourse.paraview.org/u/Rohit_Singh)
#### Post date: [January 2, 2024, 9:42am UTC](https://discourse.paraview.org/t/understand-the-time-evolution-of-some-variables-by-using-plot-data-over-time/13622/3 "2024-01-02T09:42:11Z")

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Dear Westphal,

Thank you for the response. I am attaching the link to access the .cgns files.

[https://drive.google.com/drive/folders/1WLLbmuJjsHv6gLEnox0gWwgQ0Piz-hzN?usp=sharing](https://drive.google.com/drive/folders/1WLLbmuJjsHv6gLEnox0gWwgQ0Piz-hzN?usp=sharing)

I want to read all these .cgns file in a single task allocated in pipeline browser to time evolution of UDMI 5 in the data given in files. It would be very helpful if you can help me resolving this.

If anything else is needed, please let me know.

Thanks and best regards

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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 2, 2024, 11:02am UTC](https://discourse.paraview.org/t/understand-the-time-evolution-of-some-variables-by-using-plot-data-over-time/13622/4 "2024-01-02T11:02:06Z")

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Hi @Rohit_Singh

You should change your naming scheme from `FFF.[time_value].cgns` to `FFF.[time_step].cgns`  
Or use a `.series` file to create a valid time series.

best,