Current Carrying Wire Inside an Iron Pipe  
Current = 100 A in a 2-cm-diameter conductor
Wire is above center of pipe

; Copyright 1998, by the University of California. 
; Unauthorized commercial use is prohibited. 

&reg kprob=0,    ! Poisson or Pandira problem
mat=2,           ! Material is iron
mode=-1,         ! Some materials have fixed permeability
fixgam=0.0005,   ! Permeability 
dx=0.3,dy=0.3    ! Mesh intervals
icylin=0,        ! Cartesian coordinates
nbsup=0,         ! Dirichlet boundary condition at upper edge
nbslo=0,         ! Dirichlet boundary condition at lower edge
nbsrt=0,         ! Dirichlet boundary condition at right edge
nbslf=0          ! Dirichlet boundary condition at left edge
ibound=0 &       ! Dirichlet boundary condition on this region's boundary

&po x=30.,y=15. &
&po nt=2,r=15.,theta=90.,x0=15.,y0=15 &
&po nt=2,r=15.,theta=180.,x0=15.,y0=15 &
&po nt=2,r=15.,theta=270.,x0=15.,y0=15 &
&po nt=2,r=15.,theta=360.,x0=15.,y0=15 &

&reg mat=1 &
&po x=25.,y=15. &
&po nt=2,r=10.,theta=90.,x0=15.,y0=15 &
&po nt=2,r=10.,theta=180.,x0=15.,y0=15 &
&po nt=2,r=10.,theta=270.,x0=15.,y0=15 &
&po nt=2,r=10.,theta=360.,x0=15.,y0=15 &

&reg mat=1,cur=100. &
&po x=16.,y=20. &
&po nt=2,r=1.,theta=90.,y0=20.,x0=15 &
&po nt=2,r=1.,theta=180.,y0=20.,x0=15 &
&po nt=2,r=1.,theta=270.,y0=20.,x0=15 &
&po nt=2,r=1.,theta=360.,y0=20.,x0=15 &

