eddy-curr in a tube

[Roberto Brambilla <rlbrambilla@xxxxxxx>]

Hi, femm-friends

I have a tube of finite length=2L, inner-radius=b, 
outer radius=a, relative mag. perm.=mur, 
el. conductivity=sigma. 
An infinite alternating current line Io.exp(jwt) is positioned 
(1) on the axis of the tube;
(2) parallel to the axis, out at a distance c<b (inside).
Do you know if any analytical solutions for eddy currents
in the tube exist to compare with FEMM analysis?
Thank you in advance Roberto.
Roberto Brambilla
CESI
Via Rubattino 54
20134 Milano
tel +39.2.2125.5875
fax +39.2.2125.610
rlbrambilla@xxxxxxx