Symmetric diverging\converging tees K calculation

[Filprots]

Hello! Very nice and useful library you wrote.
I think this (Symmetric diverging\converging tees K calculation) feature is needed to complete the tees calculations covering all possible cases.
Thanks.

[CalebBell]

Hi Filprots,

Thanks for the compliment. Are you using fluids? I'd be interested in hearing what for, if you'd like to share.

Would you care to elaborate on these type of tees? Do you mean 4-way "+" shaped junctions? They definitely are not in Crane. Would you care to suggest a source and include their equations in the issue?
Even this would not come close to covering all cases of tees unfortunately - there are far more configurations out there, most with little to no published data available at all, so I feel no urgency for this to be added to fluids, although I would be happy to accept a good PR.

Cheers,
Caleb

[Filprots]

Dear Caleb.

I'm currently working on web project powered by NodeJS and all my code is in JavaScript, so i dont use your library directly, but it was very helpful for me to figure out some things, beacuse sometimes in sources there are some errors that makes it hard to achieve good result.
Unfortunately, i don't code in Python, so i can't make proper PR for your project. But i appreciate your efforts on this subject. And i definitely want it to grow up into irreplaceable tool for hydraulics engineers.

About tees.
No, i didn't mean that complicated cases, like 4-way junctions or shaped offtakes. That is not so neccesary at the moment because of wide variety of cases, and it will be hard work to systematize an approach for solving them algorythmically.
I just meant two more cases for 3-way tees not covered by the Crane method :

• The symmetrical converging tee
  

The symmetrical diverging tee

Equations for this cases i've found in this source (1)
http://www.doria.fi/bitstream/handle/10024/39713/nbnfi-fe200808041754.pdf
The author of equations is Andrew Vazsonyi

Here is screenshots of equations :

In (1) there's also another approach for solving this situations presented by Andrew Gardel.

Will that be helpful for your project?
Which method do you prefer?

[Filprots]

P.S. Just found out that some more versions of equations for this cases are given in Idelchik's "Handbook for hydraulic resistances 1994".

[CalebBell]

Hi Filprots,

Thanks for the suggestions! Those look like great sources. I had indeed forgotten that the Crane model did not cover those scenarios. I agree the symmetric cases would great be to have in fluids. I have heard of the Gardel method before, but it may not be that accurate. The newer method looks a little better. It's still not a topic I am actively working on, but it's still a topic I expect to look at at some point.

Good luck,
Caleb

[dkliu1]

I'm interested in this enhancement too.
Note that the master thesis mentioned in the source above is relocated to
https://lutpub.lut.fi/bitstream/handle/10024/39713/nbnfi-fe200808041754.pdf