# In CFD, there are streamlines and streamtubes. What is a stream surface like?

**URL:** https://discourse.paraview.org/t/in-cfd-there-are-streamlines-and-streamtubes-what-is-a-stream-surface-like/16374
**Category:** ParaView Support
**Created:** [March 24, 2025, 8:51am UTC](https://discourse.paraview.org/t/in-cfd-there-are-streamlines-and-streamtubes-what-is-a-stream-surface-like/16374 "2025-03-24T08:51:21Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![hdz19900725](https://discourse.paraview.org/user_avatar/discourse.paraview.org/hdz19900725/32/7157_2.png) [@hdz19900725](https://discourse.paraview.org/u/hdz19900725)
#### Post date: [March 24, 2025, 8:51am UTC](https://discourse.paraview.org/t/in-cfd-there-are-streamlines-and-streamtubes-what-is-a-stream-surface-like/16374/1 "2025-03-24T08:51:21Z")

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In CFD, there are streamlines and streamtubes. What is a stream surface like?

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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: [March 24, 2025, 12:32pm UTC](https://discourse.paraview.org/t/in-cfd-there-are-streamlines-and-streamtubes-what-is-a-stream-surface-like/16374/2 "2025-03-24T12:32:06Z")

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Here is an example:

 ![image](https://discourse.paraview.org/uploads/default/original/3X/6/a/6a4c5def8d26ccb5be803c31875584a206035642.jpeg)

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### Author: ![hdz19900725](https://discourse.paraview.org/user_avatar/discourse.paraview.org/hdz19900725/32/7157_2.png) [@hdz19900725](https://discourse.paraview.org/u/hdz19900725)
#### Post date: [March 25, 2025, 6:05am UTC](https://discourse.paraview.org/t/in-cfd-there-are-streamlines-and-streamtubes-what-is-a-stream-surface-like/16374/4 "2025-03-25T06:05:31Z")

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Thank you. How can I generate such a stream surface in ParaView?

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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: [March 25, 2025, 8:20am UTC](https://discourse.paraview.org/t/in-cfd-there-are-streamlines-and-streamtubes-what-is-a-stream-surface-like/16374/5 "2025-03-25T08:20:42Z")

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I’m afraid it is not exposed in ParaView, but it should be trivial to add.