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Asymptotic boundary condition
Hello
I tried to make a simple simulation to verify the
asymptotic b.c.
I take a coil with a current and I simulate the B
field at 1 m on axis (B1) and 90° off axis (B2). In
the field produced by a dipole the ratio between B1
and B2 should be 3 but with the mixed b.c. and the
appropriate c0 I find that the ratio is nearly 2.
I make an error somewhere?
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[Format] = 3.0
[Frequency] = 0
[Precision] = 1e-008
[LengthUnits] = millimeters
[ProblemType] = axisymmetric
[Coordinates] = cartesian
[Comment] = "Spira percorsa da corrente.\n"
[PointProps] = 0
[BdryProps] = 1
<BeginBdry>
<BdryName> = "New Boundary"
<BdryType> = 2
<A_0> = 0
<A_1> = 0
<A_2> = 0
<Phi> = 0
<c0> = 796000
<c1> = 0
<Mu_ssd> = 0
<Sigma_ssd> = 0
<EndBdry>
[BlockProps] = 2
<BeginBlock>
<BlockName> = "Copper"
<Mu_x> = 1
<Mu_y> = 1
<H_c> = 0
<H_cAngle> = 0
<J_re> = 10
<J_im> = 0
<Sigma> = 58
<d_lam> = 0
<Phi_h> = 0
<LamType> = 0
<LamFill> = 1
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "Air"
<Mu_x> = 1
<Mu_y> = 1
<H_c> = 0
<H_cAngle> = 0
<J_re> = 0
<J_im> = 0
<Sigma> = 0
<d_lam> = 0
<Phi_h> = 0
<LamType> = 0
<LamFill> = 1
<BHPoints> = 0
<EndBlock>
[CircuitProps] = 0
[NumPoints] = 6
50 0 0 0
60 0 0 0
0 100 0 0
0 -100 0 0
0 1000 0 0
0 -1000 0 0
[NumSegments] = 3
4 2 -1 0 0 0
2 3 -1 0 0 0
3 5 -1 0 0 0
[NumArcSegments] = 4
0 1 180 5 0 0 0
1 0 180 5 0 0 0
3 2 180 10 0 0 0
5 4 180 10 1 0 0
[NumHoles] = 0
[NumBlockLabels] = 3
55 1 1 1 0 0 0
410 470 2 20 0 0 0
40 50 2 10 0 0 0