I have placed Dustcollector&DuctBranch dot pdf in my shared folder of Google Drive. I hope this is a link. This is the text of the matlab model file for a single branch. Someone please try the link to see if it opens of an 8 page file of Matlab coding. It should be readable.
https://drive.google.com/drive/folde...Cg&usp=sharing
This is the matlab .m file that could be executed if loaded into Matlab.
https://drive.google.com/drive/folde...Cg&usp=sharing
I am fully aware that this is not easy to follow. I hope to have time to write up and explanation of the calculation soon.