Stream Tracer - from surface

ParaView Support
1

Hi All,

Apologies if this has been covered, however I was unable to find it if it is.

I would like to know how to seed streamlines from a surface, specifically any inlet within a solution.

To simplify, if we have a rectangular section with an inlet at one end, is it possible to seed stream lines from that surface rather than using the spherical point location or line source?

Thanks

2

Yes, StreamTracerWithCustomSource.

3

Thanks Mathieu,
I had not seen it, this software is huge and powerful…

much appreciated!

4

What are the main contributors to causing it to calculate the very slowly? my grid is less than 1*10^6 cells, albeit with 3 individual inlets and 1 single outlet…

5

How many seeds (points) do you have in your custom source ?
Are you running ParaView in parallel ?

If you want to have a quick look into the flow, you may want to use the StreamLines representation :

  • Tools -> ManagePlugin -> StreamLinesRepresentation -> Load
  • Create a new view
  • Use the new StreamLine representation instead of surface/outline/etc
6

Yes I see now the influence of the number of seed points is substantial.

I have tried to use the Mask Points function (which can reduce the # of points??) in the workflow;

  • celldata.vtu
  • CellDatatoPointData
  • Mask Points
  • StreamTracerWithCustomSource
    - Not sure of the flow here, do you select input source as CellDatatoPointData or MaskPoints?
    - And also do you select Seed Source as your custom seeding surface?
7

Not sure of the flow here, do you select input source as CellDatatoPointData or MaskPoints?

Input should be celldata.vtu, Seed source should be MaskPoints

8

Uh so do the mask points filters have to be applied to each surface of interest “for seeding” individually?

9

Maybe the easiest way would be to append all your seed surface together using AppendDataSet filter, then use MaskPoint on that.

10

Late to the party, but I’ve sometimes used a decimate/resample instead of MaskPoint