The iteration section provides the information related to the current solve iteration, in case of Automatic settings. In case of Manual settings, there will be only one section, for a single iteration corresponding to the chosen settings.
Iteration number #4 ***************************
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Increasing the geometric refinement..
Refinement completed
Mesh refinement (-m): 0.0131762
***************************************
Computing the links..
Number of panels after refinement: 480
Number of links to be computed: 45824
Done computing links
***************************************
Precond Type(s) (-p): Jacobi
GMRES Iteration: 0 1 2 3 4
GMRES Iteration: 0 1 2 3 4
Capacitance matrix is:
Dimension 2 x 2
g1_mycube 8.26757e-011 -2.73819e-011
g2_mycube -2.73807e-011 8.26804e-011
Weighted Frobenius norm of the difference between capacitance (auto option): 0.00994789
Solve statistics:
Number of input panels: 12 of which 12 conductors and 0 dielectric
Number of input panels to solver engine: 24
Number of panels after refinement: 480
Number of potential estimates: 22912
Number of links: 46304 (uncompressed 230400, compression ratio is 79.9%)
Max recursion level: 18
Max Mesh relative refinement value: 0.0131762
Iteration time: 0.092000s (0 days, 0 hours, 0 mins, 0 s)
Iteration allocated memory: 12530 kilobytes
In the following, each subsection of the iteration section will be examined
Iteration number #4 ***************************
***************************************
Increasing the geometric refinement..
Refinement completed
Mesh refinement (-m): 0.0131762
***************************************
Computing the links..
Number of panels after refinement: 480
Number of links to be computed: 45824
Done computing links
***************************************
Precond Type(s) (-p): Jacobi
The prologue contains:
GMRES Iteration: 0 1 2 3 4
GMRES Iteration: 0 1 2 3 4
The solve subsection shows the status of the current calculation. The iterations will go on until convergence of the iterative linear system solution is achieved, within the required relative accuracy as set with the -t parameter (see 'Gmres tolerance' in the above Prologue subsecton and the Run Menu dialog box paragraph).
There will be one row of iterations for each separate conductor described in the input file.
If the -r global option is selected (see the Run Menu dialog box paragraph), also the residual at each iteration will be provided, as in the example below:
GMRES Iteration: 250 0 3.33 1 0.2 2 0.0145 3 0.00653 4 0.002
GMRES Iteration: 250 0 3.33 1 0.2 2 0.0146 3 0.00656 4 0.002
Capacitance matrix is:
Dimension 2 x 2
g1_mycube 8.26757e-011 -2.73819e-011
g2_mycube -2.73807e-011 8.26804e-011
The result subsection contains the actual matrix capacitance resulting from the current iteration.
Besides the information about the matrix dimension, each row of the capacitance matrix will report the information about the conductor name. The conductors referred in the columns follow the same order of the rows (the matrix is, anyway, symmetric).
The format of the output matrix is that of a Maxwell capacitance matrix.
This means that with respect to the follwing figure, showing the actual self and mutual capacitances between the two cubes considered in the example:
the resulting matrix has the form:
It follows that:
C11 = 8.268e-011 -2.738e-011 = 5.530e-011 = 55.30 pF
C12 = C21 = -( -2.738e-011 ) = 2.738e-011 = 27.38 pF
In the 2D case, the potential at infinity is not zero (the potential decreases as log(1/r), where 'r' is the distance from the source). Therefore, the potential is always referenced to one of the conductors, which is assumed to have zero potential (ground conductor). This last conductor is therefore not explicitly included in the Maxwell capacitance matrix row / columns.
Remember also that the unit of measurement of the capacitance matrix in this case is F/m.
Weighted Frobenius norm of the difference between capacitance (auto option): 0.00994789
Solve statistics:
Number of input panels: 12 of which 12 conductors and 0 dielectric
Number of input panels to solver engine: 24
Number of panels after refinement: 480
Number of potential estimates: 22912
Number of links: 46304 (uncompressed 230400, compression ratio is 79.9%)
Max recursion level: 18
Max Mesh relative refinement value: 0.0131762
Iteration time: 0.092000s (0 days, 0 hours, 0 mins, 0 s)
Iteration allocated memory: 12530 kilobytes
The statistics subsection contains information about data used in the current iteration. In particular: