[Kappa]

Hello everybody,

I'm relatively new to ParaView and I got a -probably simple- question:

I have a 3D-object including a scalar and a vector for velocity. I was already able to plot streamlines through a 2D-inlet (instead just seeding over a line).

But I only want to "see" the streamlines in the voxels where the scalar is larger than 0 (this scalar can take values between 0 and 1).
I tried to use "Extract cells by region" but then streamlines which go farer then my specified area disappear. I do not want to let them disappear, I want them to be cut off as soon as they reach a voxel with scalar==0.

I hope this is possible, cause now ParaView plots streamlines where there is actually no flow.

Thanks for help everbody
(Btw I'm new here, thus, I hope I fullfiled all rules with this post)

[Antimony]

Hi,

Have you tried the "Threshold" filter in Paraview?

Cheers,
Antimony

[Kappa]

Hey,

I don't know if someone has the same problem but I found a solution which is so far appropriate for my purposes:

I apply the "Treshold"-filter on the "Stream Tracer with Custom Source" and define the min. (1e-4) and max. (1) value for the scalar.

Maybe I can help someone with this solution.

[Kappa]

Originally Posted by Antimony

Hi,

Have you tried the "Threshold" filter in Paraview?

Cheers,
Antimony

Hey, yeah as I already worte, this is exatly what I needed.
Thanks for your reply

[Vishsel]

Hi all,

How to reduce the number of streamlines in paraview ? if i change or reduce the ''maximum steps 2000'', there is formation of incompletion in my streamlines .

Thank you in advance
Vishsel

[momentumv]

Originally Posted by Vishsel

Hi all,

How to reduce the number of streamlines in paraview ? if i change or reduce the ''maximum steps 2000'', there is formation of incompletion in my streamlines .

Thank you in advance
Vishsel

If you're using a line to seed the streamlined, you want to change the resolution term, not max steps.

[Vishsel]

Hi momentumv,

Thank you for your reply.
I am using StreamTracerWithCustomSource to generate the streamlines. So where i could find the option to reduce the no. of streamlines in StreamTracerWithCustomSource ?

Thank you in advance
Vishsel

[momentumv]

Originally Posted by Vishsel

Hi momentumv,

Thank you for your reply.
I am using StreamTracerWithCustomSource to generate the streamlines. So where i could find the option to reduce the no. of streamlines in StreamTracerWithCustomSource ?

Thank you in advance
Vishsel

The custom source provides points that are the seed for the streamlines. To reduce the number of streamlines, reduce the number of points that you have in the custom source.