$CellNumber

Format

$CellNumber
 Nx
 Ny
 Nz                // where Nx, Ny, Nz are integers.

This defines the number of nodes in x, y, and z directions without the layer of PML. That is, the total number of nodes in simulation may NOT be $\begin{smallmatrix}{N_x \times N_y\times N_z}\end{smallmatrix}$.

NOTE 1: The priority of this function is below the function -- $Deltaxyz, i.e., the program abandons $CellNumber while using $Deltaxyz.
NOTE 2: Since the position of the last point would not be beyond the boundary we set in $SpaceRegion, the mesh size may be different with what we think on intuition. For instance, if Nx=101 and x is from 0~100e-9 (m), so dx = 100e-9/(101-1+0.5) ~9.95e-10 (m). (due to the equivalent array size in 6 field.)

Example

$CellNumber
 201
 201
 201

Thus, without PML, there is 201 nodes in x direction, so as the number of nodes are in y and z direction.

Related commands

$SpaceRegion, $CellNumber, $Deltaxyz