Streamlines on a 2D slice from a 3D domain

ParaView Support
1

Hello everyone

I wanted to know if there exists any approach to plot streamlines on a 2D slice of a 3D domain.

Based on the discussions in this forum, I have managed to generate Surface LIC - a good way of visualizing streamlines on a 2D slice of a 3D domain with the following steps :

  • I load the .pvd file in the attachment below.

  • Use a calculator to compute the velocity vector (named vel) from the physical velocity components.

  • Slice the domain using the slice filter.

  • Visualize vel using Surface LIC

Paraview screen below :

paraview_screen
paraview_screen1366×741 263 KB

Unfortunately, the density of these lines is very high which makes it difficult for the reader to visualize the corner vortex structures if put on a paper. So, I wanted to know if any alternative approach exists.

For the case of a 2D domain, I adopt a usual approach - generate points using the Mask points filter and apply the Stream Tracer With Custom Source filter to visualize the streamlines. By controlling the number of mask points, I can appropriately control the density of these streamlines.

I have tried a similar approach for the current 3D case by using the Mask points filter after slicing the domain. Unfortunately, I get an error - “No points to mask” with an empty figure in the layout.

For reference the attachment can be found in this link.

Thanks
Sthavishtha

2

Seems like you need something like:
https://blog.kitware.com/evenly-spaced-streamlines-2d/

Unfortunately, this only works on 2D planes perpendicular on Z for now.
It could be extended to work on arbitrarily oriented planes, but we’ll need to identify funding for this work.

dan

3

Thanks for the reply. As of now, I just need it to work on planes perpendicular to the X, Y and Z axes.

I use Paraview 5.4.1 and I am unfortunately unable to find the filter you mention - EvenlySpacedStreamlines2D. Additionally, the clt dataset in the link you mention doesn’t seem to open - it gives me an error.

I have also tried the approach from this link but can’t get it to work as well. This should sound obvious, but I am not sure where I am going wrong. Do you have any suggestions?

Thanks
Sthavishtha

4

It might be that the ParaView version you are using is too old. The filter is available in the latest ParaView version 5.8.
There is a link in the blog to both the clt dataset and a paraview state file that creates the visualizations in the blog.

Dan

5

Thanks for your comments @danlipsa.

For the Ubuntu 18.04 bionic, Paraview 5.4.1 is the stable version available via apt-cache. I shall try to update this sometime later.

As of now, I use an inconvenient (and a tedious approach) to resolve this problem - I save the sliced data of the 3D domain into a VTK file (which will essentially be a 2D domain) and import this in a new paraview window. Then, I repeat the procedure for plotting streamlines in 2D as usual.