「$CellNumber」：修訂間差異
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已建立頁面，內容為 "<font size=5>'''Format'''</font> $TimeStep ''int'' <font color=green>// where ''int'' is an integer.</font> <font size=3>This value tells the prog..." |
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=='''Format'''== | |||
$CellNumber | |||
'' | ''N<sub>x</sub>'' | ||
''N<sub>y</sub>'' | |||
''N<sub>z</sub>'' <font color=green>// where ''N<sub>x</sub>'', ''N<sub>y</sub>'', ''N<sub>z</sub>'' are integers.</font> | |||
<font size=3>This | <font size=3>This defines the number of nodes in ''x'', ''y'', and ''z'' directions without the layer of PML. That is, the total number of nodes in simulation may '''NOT''' be <math>\begin{smallmatrix}{N_x \times N_y\times N_z}\end{smallmatrix}</math>.</font><br><br> | ||
<font size=3 color=red>'''NOTE 1'''<font color=black>: The priority of this function is below the function -- [[$Deltaxyz]], ''i.e.'', the program abandons [[$CellNumber]] while using [[$Deltaxyz]].</font><br> | |||
'''NOTE 2'''<font color=black>: 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.) | |||
<font | </font></font> | ||
=='''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]] | |||
於 2018年10月12日 (五) 02:17 的最新修訂
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 .
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.