FastHenry tool looks very useful and handy to calculate R and L impedance matrix of different structures. The website is here.
LuaMath and then created an input file with all the segments. The repository for the utils and the code is here
- The obtained inductance matches the inductance calculated for a circular wire using the inductance expression as given here
- the skin effect also shows up because I see the resistance increasing with frequency and the inductance falling somewhat.
- When i removed the .equiv statements which was making all the starting nodes of all the segments of the same potential the inductance changed a little bit not much but the skin effect was lost.