Hello.
I just started to study the program on my own.
And I don’t know how to build dependency graphs V(Q), Re(Q), lambda(Q) and delta p1 (Q) (see the file).

Сan you help with advice?
Thanks in advance.

Raschjot gidrolinii.sm (17,32 KiB) scaricato 1237 volta(e).

Wrote

Сan you help with advice?

Maybe Colebrook will help to complete your document.
Cheers ... Jean.

Raschjot gidrolinii [incomplete].sm (18,45 KiB) scaricato 1081 volta(e).
Inst_Colebrook Pipe Data.sm (71,45 KiB) scaricato 1221 volta(e).

Thank you for the help

Here is a tip to your projects.
SMath vector/matrix/array indexes start from 1, not 0.
That will cause problems on your worksheets.
If you are rewriting a page from mathcad or similar, keep this in mind.

Regards

Thanks for the help.
I found another mistake.
Everything works now.
Now I'm trying to plot graphs...



Raschjot gidrolinii.sm (1,68 MiB) scaricato 1301 volta(e).

Changed the code a little and built a variant of the graphs
Raschjot gidr.sm (40,2 KiB) scaricato 1261 volta(e).

Wrote

Changed the code a little and built a variant of the graphs
Raschjot gidr.sm (40,2 KiB) scaricato 1261 volta(e).

Your solution is very beautiful

I saved in my personal file.
Check Δp ... it looks bizarre.

Inst_Colebrook PipeLine [unk].sm (19,78 KiB) scaricato 1056 volta(e).

Wrote

I saved in my personal file.
Check Δp ... it looks bizarre.

Inst_Colebrook PipeLine [unk].sm (19,78 KiB) scaricato 1056 volta(e).

Thank you, Jean. You're right
I understand.
Because Lambda is calculated using three different formulas.
Interpolation is also needed.
But overall the solution looks right.

Best regards, Tolik

Interpolation is also needed.

Approximation in this case

Wrote

Thank you, Jean. You're right
I understand.
Because Lambda is calculated using three different formulas.
Interpolation is also needed.
But overall the solution looks right.
Best regards, Tolik

Nothing wrong to adapt third segment for a smooth junction,
or simply ignore for elongating 2nd segment.
Take care ... Jean.

Inst_Colebrook PipeLine [unk].sm (24,9 KiB) scaricato 1032 volta(e).

Wrote

Thank you, Jean. You're right
I understand.
Because Lambda is calculated using three different formulas.
Interpolation is also needed.
But overall the solution looks right.
Best regards, Tolik

I think you should initialize λ1:=64
Δp interpolation is straightforward as given.
λ interpolation will surely need Thiele.
Please, let me know if you want λ interpolation.
Have a good day Kamarad ... Jean.

Wrote

I think you should initialize λ1:=64
Δp interpolation is straightforward as given.
λinterpolation will surely need Thiele.
Please, let me know if you want λ interpolation.
Have a good day Kamarad ... Jean.

All your data sets have been converted to scalar functions.
Thiele is exceptional for Lambda.
By observation, Delta P needs better adjusting
segment 1 and segment 2 ... refine 2/3 junction.
All that done, it remains specific as demo, is it ?
Cheers ... Jean.

Inst_Colebrook PipeLine [unk].sm (266,8 KiB) scaricato 1072 volta(e).

... project refined for your comments.
Have a good visit ... Jean.

Inst_Colebrook PipeLine [unk].sm (267,71 KiB) scaricato 1064 volta(e).

Sorry. I do not know the program well enough to properly evaluate your modifications and amendments.
You did a great job in my opinion.
In fact, the pressure will undergo two transitions.
The first transition: the destruction of the laminar flow and the appearance of the first large vortices.
The second transition: the core of the flow begins to touch the tops of the roughness of the pipe walls.
But I don't know exactly how they will affect the graph..
Yes, at this stage I needed to get a rough solution.

This is only the first section of the calculation of the system.
There are four of them.
Moreover, at the end, the pipeline has a branch. As a result, the solution is expected to be quite long.

Best regards, Tolik

Wrote

Moreover, at the end, the pipeline has a branch. As a result, the solution is expected to be quite long.
Best regards, Tolik

Perpendicular branches create singular losses.
Better conserve this refreshed version.
Nice project ... Jean.

Inst_Colebrook PipeLine [unk].sm (88,36 KiB) scaricato 1075 volta(e).