# Visualizing CFD results like in FluidX3D

**URL:** https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731
**Category:** ParaView Support
**Tags:** cfd, vtk
**Created:** [May 28, 2024, 8:23pm UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731 "2024-05-28T20:23:31Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![ArminAmarr](https://discourse.paraview.org/user_avatar/discourse.paraview.org/arminamarr/32/14507_2.png) [@ArminAmarr](https://discourse.paraview.org/u/ArminAmarr)
#### Post date: [May 28, 2024, 8:23pm UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731/1 "2024-05-28T20:23:32Z")

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Hi,

Sorry for the beginner’s question 🙂

I’ve generated VTK files containing velocity (u) in FluidX3D and would like to get it visualized like in the video.

Could you please advise me on the proper way to do it?  
Perhaps there are already some presets or “standard ways” that can be used?

[![](https://discourse.paraview.org/uploads/default/original/2X/b/b321d66651cedeeacc709bc1319cd53b235d7b03.jpeg "Cessna 172 in FluidX3D CFD - 220 million cells - 10 minutes on Titan Xp GPU") ](https://www.youtube.com/watch?v=NFai8lR4QFw)

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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: [May 29, 2024, 9:22am UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731/2 "2024-05-29T09:22:13Z")

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Which format does FluidX exports to ?

Please share your data.

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### Author: ![ArminAmarr](https://discourse.paraview.org/user_avatar/discourse.paraview.org/arminamarr/32/14507_2.png) [@ArminAmarr](https://discourse.paraview.org/u/ArminAmarr)
#### Post date: [May 29, 2024, 11:38am UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731/3 "2024-05-29T11:38:09Z")

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Thank you, @mwestphal

That’s VTK.

Please find the data on [Paraview - Google Drive](https://drive.google.com/drive/folders/1BpoUJTlqEfAFkwg1dFjxq0cJyZGxWSzH?usp=sharing)

Just sharing the relevant picture.

 ![image-000002260](https://discourse.paraview.org/uploads/default/original/2X/6/61d6b144b5b3be4fd9eb09194049b8115c7d8097.jpeg)

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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: [May 31, 2024, 8:12am UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731/4 "2024-05-31T08:12:02Z")

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Here you go, with some VolumeRendering + isosurface.

 ![image](https://discourse.paraview.org/uploads/default/original/2X/e/e99a0451231b9377864bcd97e9d20e122ba23d8f.jpeg)

Streamlines looks nice too:

 ![image](https://discourse.paraview.org/uploads/default/original/2X/e/eca04ede2f55ba463ad474deb1c013257056aa15.jpeg)

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### Author: ![ArminAmarr](https://discourse.paraview.org/user_avatar/discourse.paraview.org/arminamarr/32/14507_2.png) [@ArminAmarr](https://discourse.paraview.org/u/ArminAmarr)
#### Post date: [June 5, 2024, 5:36pm UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731/5 "2024-06-05T17:36:47Z")

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Thank you, @mwestphal.  
I’m looking for a way to visualize the Q-Criterion isosurface.  
Maybe you can advise me on how to do it?

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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: [June 6, 2024, 6:48am UTC](https://discourse.paraview.org/t/visualizing-cfd-results-like-in-fluidx3d/14731/6 "2024-06-06T06:48:30Z")

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Q Criterion can be computed using the Gradient filter.