# Vorticity computed with streamlines

**URL:** https://discourse.paraview.org/t/vorticity-computed-with-streamlines/5829
**Category:** ParaView Support
**Created:** [November 17, 2020, 6:52pm UTC](https://discourse.paraview.org/t/vorticity-computed-with-streamlines/5829 "2020-11-17T18:52:21Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jordi1](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/ee59a6/32.png) [@jordi1](https://discourse.paraview.org/u/jordi1)
#### Post date: [November 17, 2020, 6:52pm UTC](https://discourse.paraview.org/t/vorticity-computed-with-streamlines/5829/1 "2020-11-17T18:52:21Z")

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Hello!

I was computing some flow streamlines and I saw this option to compute vorticity (see pic attached). I was wondering if there is any theory guide that can explain how this vorticity is computed in order to see the difference between this vorticity and other indices such as Q-criterion or Lambda 2.

Thank you in advance,

[Screenshot 2020-11-17 at 19.07.05|344x187](https://discourse.paraview.org/uploads/short-url/p6NuegmyEsX7CLXomR77gyMyQAJ.png)