# Create 2D streamlines of periodic 3D dataset

**URL:** https://discourse.paraview.org/t/create-2d-streamlines-of-periodic-3d-dataset/11863
**Category:** ParaView Support
**Created:** [April 12, 2023, 3:03pm UTC](https://discourse.paraview.org/t/create-2d-streamlines-of-periodic-3d-dataset/11863 "2023-04-12T15:03:57Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Boone](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/b/c67d28/32.png) [@Boone](https://discourse.paraview.org/u/Boone)
#### Post date: [April 12, 2023, 3:03pm UTC](https://discourse.paraview.org/t/create-2d-streamlines-of-periodic-3d-dataset/11863/1 "2023-04-12T15:03:57Z")

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Hi all,

I am studying a downward facing step in 3D. The transverse direction is periodic. I would like to create 2D streamlines of my data.

Currently I use:  
Temporal statistics to get a temporal average of the velocity and then I apply the StreamTracer filter but the obtained results are a bit messy:

 ![streamlines](https://discourse.paraview.org/uploads/default/original/2X/4/4d991c7ce5383303e5bfab9e9d0baa3c0953b07d.png)

I guess I should have more saved instant to obtain clearer streamlines but is there a way of improving the visualisation of theses streamlines? Maybe averaging in the transverse direction? How can I do it?

Thanks for your help 😉