"ITRI-NTU 3D-FDTD" 修訂間的差異

於 2019年7月30日 (二) 17:06 的修訂

3D-FDTD is called from three dimensional finite difference time domain method. This program models computational electrodynamics which is refer to the book Computational Electrodynamics: The Finite-Difference Time-Domain Method, Third Edition, by Allen Taflove.

Input file 1: commands and parameters

Be careful: Although most sequences of functions are not important, the function $NumberofObject MUST appear before the function $MaterialStructure and $MaterialParameter.

Files setting

$SParameterDirectory

$OutputDirectory

$OutputName

$OutputMaxReflection

Unit setting

$UnitConvert

Time setting

$TimeStep

$OutputStep

$StopCriteria

Space setting

$SpaceRegion

$CellNumber

$Deltaxyz

$BCsetting

$PMLlayer

Source setting

$SourceType

$SourceAmp

$SourcePosition

$SourceFrequency

Material setting

$NumberofObject

$MaterialStructure

$MaterialParameter

Near-to-Far-Field setting

$NTFFposition

$NTFFparameter

Generation setting

$DFTallField

$CalGeneration

Gmsh setting

$UseGmsh

$GmshTag

For more information about Gmsh, see Gmsh website.

Input file 2: commands and parameters

Note: You can run the FDTD program WITHOUT the input file 2. However, if using this, you should really know the meaning of each function and parameter; otherwise, the program may not execute correctly as you change any default parameter.

$SaveType

$CourantFactor

$Backgroundparameter

$CPML_m

$CPML_max_kapa

$CPML_ma

$CPML_max_a

$CPML_ratio_maxsigma

$IncCPMLpar

$Output1Dincident

The format of output files

These pages present text format. XX means it could be Ex, Ey, Ez, Hx, Hy, or Hz. And n represents the time step.

Setting results

*.gn

*.ind

*.XX.ps

*.fld.par

*.pml.par

*.typ.par

*.so.time

*.so.freq

*.ntff.par

*.dft.par

Results at certain time step (n)

*.step-n.XX.dat

*.step-n.inc.dat

*.step-n.XX.dft

*.refl

Results after time-stepping

*.rcs

*.gen

*.f-ii.ggen

The meaning of the parameters in source codes