code_saturne User's Forum

Hi,
I am trying to extract the pressure and velocity profile on a 1D line using Code Saturne 5.0.9. To do this I am using the GUI, and I have inserted a code very close to the example given: x = x0*s + x1*(1-s) and likewise for the other coordinates.
My line goes backwards approximately along z (from 1.7 to 0.016). An example is attached. My question regards the first column of the profile: why is the column labeled as 's' going from approximately 0 to 1.68? I thought that s should be bound between 0 and 1, to make sense. While there are some fluctuations in coordinates x and y in my file (I think that it is due to closest cells) z coordinate seems correct for all the 200 points, while 's' reaches 1 much earlier.
Should I consider my results correct?
Thank you
Claudio

Oh, no, I'm sorry.
It should be the arc length.

Hi,

I'm encountering a similar problem. I'm trying to export profiles along a given vertical line (constant x and z, while y is varying).

In the GUI, I set formulae as in the given example, using the s parameter to make y vary.

But :
- I do not obtain the number of points that I asked for ; instead of 200, I get 69 points.
- s does not vary between 0 and 1.

I guess I missed some specification, probably about s. How could I fix it ?

Thanks in advance.

Best regards,
Christophe

Hello,

Which version of the code are you using ?

Regards,

Yvan

Hello Yvan,

I'm using version 6.0.6

Hello,

With version 6.0.6, if you use profiles as defined in user functions (probe sets), you have the choice between a line/cell intersection approach (1 value per cell), or a given set of probes with a "snap to cell center" or "snap to vertex" option (keeping only one of probes lying in the same cells), or to simply keep al points.
Using this option, you can control sbetween 0 and 1.

Using the GUI, when multiple points are associated to the same cell, only one is kept. So it explains why you have less points.
The curvilinear coordinate s should also be between 0 and 1, but I have seen strange behavior for this and am not sure.

In v7, things are unified, so the newer system (available in v5 and v6 in user functions) is also managed through the GUI.

Best regards,

Yvan

OK thank you Yvan for your answer.

When is v7 gonna be released ?

Best regards,
Christophe

Hello,

V7 should be released in May. We may provide a .tar.gz release for release candidates a bit earlier.
If you are pulling the code from GitHub, the v7.0 branch is available, and probably as stable as v6.0 by now.

Best regards,

Yvan