# Unit normal Vector Fluid Interface

**URL:** https://discourse.paraview.org/t/unit-normal-vector-fluid-interface/7316
**Category:** ParaView Support
**Created:** [May 28, 2021, 9:46am UTC](https://discourse.paraview.org/t/unit-normal-vector-fluid-interface/7316 "2021-05-28T09:46:10Z")
**Posts on this page:** 1
**Showing post:** 14

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### Author: ![Stewart\_Gospel](https://discourse.paraview.org/user_avatar/discourse.paraview.org/stewart_gospel/32/12807_2.png) [@Stewart\_Gospel](https://discourse.paraview.org/u/Stewart_Gospel)
#### Post date: [November 7, 2023, 7:42pm UTC](https://discourse.paraview.org/t/unit-normal-vector-fluid-interface/7316/14 "2023-11-07T19:42:58Z")

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Hi @Kenichiro-Yoshimi, thanks for the help. I am trying to do a similar thing but I am still a beginner in Paraview. Is it possible for you to outline the steps to do this? Starting from loading the ParaView.foam file. I have tried to do it myself, somehow I get the interface curvature but I do not see the normal vertor as I see here in your image.

@mwestphal can you also help with the steps? I just need the steps and a short explanation. I can figure out the rest by myself.

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