Hi all,
I am modelling superconducting magnet systems with comsol. I had a simple method of getting the right current density in coils using the AC/DC module whereby I calculate the number of turns based on the cross section of the coil and wire area which is the same for all coils. All coils then recieve the same current. This is done using various parameters.
However, when I plot the current density, there are small, but significant variations between coils which is not physically correct. I made my test case have very simple geometry to visualize it properly for area and nturns and I have seen no obvious error. At the moment I can only conclude that the comsol software has some kind of bug that does not get the current density right.