I'm trying to use the FEM workbench in FC with very basic examples to make practice but I can not understand how to manage the constraints.
For instance I'm exploiting the two balls capacitance example.
https://wiki.freecad.org/FEM_Example_Ca ... _Two_Balls
If I set one of the two balls to 1 V and the other to -1 V I expect that the potential value at the surface is going to be +1 V and -1 V respectively. But I will found always positive values and in particular the second ball will be close to the background potential as if that ball has the Far Field constraint (Which should be 0V, although in the example is 1V too).
I hope to be clear enough.
Is this happening just to me? I'm reading the results in a wrong way?
Thanks in advance.
p.s.
My system
Code: Select all
OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.2.29603 (Git)
Build type: Release
Branch: releases/FreeCAD-0-20
Hash: 930dd9a76203a3260b1e6256c70c1c3cad8c5cb8
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: Italian/Italy (it_IT)