```
TALK=T;RUN(1,1)
PHOTON USE
p

msg             Numerical solution  contours
msg                     Time=1.
con C1 Z 1 fi;0.001
msg Press Enter to continue
PAUSE
CLEAR
con EXAC Z 1 fi;0.001
msg               Exact solution  contours
msg                      Time=1.
msg Press e to END
ENDUSE
DISPLAY
PLANT sets up and solves a 2D unsteady diffusion problem with
time-dependent source and boundary conditions and compares the
results with the exact solution.

The single dependent variable is C1

The "PLANTed" formulae are:
* at the west wall the value   = TIM*YG2D**2
* at the east wall the value   = TIM*(1.0+YG2D**2)
* at the south wall the value  = TIM*XG2D**2
* at the north wall the value  = TIM*(1.0+XG2D**2)
* within the volume the source = XG2D**2+YG2D**2-4.*TIM

* the exact solution           = TIM*(XG2D**2+YG2D**2)
ENDDIS
PLANTBEGIN
PATCH(WEST,WWALL,1,1,1,NY,1,NZ,1,LSTEP)
VAL=TIM*YG2D**2
COVAL(WEST,C1,1.,GRND)
PATCH(EAST,EWALL,NX,NX,1,NY,1,NZ,1,LSTEP)
VAL=TIM*(1.0+YG2D**2)
COVAL(EAST,C1,1.,GRND)
PATCH(SOUTH,SWALL,1,NX,1,1,1,NZ,1,LSTEP)
VAL=TIM*XG2D**2
COVAL(SOUTH,C1,1.,GRND)
PATCH(NORTH,NWALL,1,NX,NY,NY,1,NZ,1,LSTEP)
VAL=TIM*(1.0+XG2D**2)
COVAL(NORTH,C1,1.,GRND)
PATCH(SOURC,VOLUME,1,NX,1,NY,1,NZ,1,LSTEP)
VAL=XG2D**2+YG2D**2-4.*TIM
COVAL(SOURC,C1,FIXFLU,GRND)
STORE(EXAC)
EXAC=TIM*(XG2D**2+YG2D**2)
PLANTEND
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************

TEXT(In-Form equivalent of PLANT case Z119   )

************************************************************
************************************************************

IRUNN = 1 ;LIBREF = 119
************************************************************
Group 2. Time dependence
* Set overall time and no. of steps
TFIRST =0. ;TLAST =1.
FSTEP = 1 ;LSTEP = 20
TFRAC(1)=0.05 ;TFRAC(2)=0.1
TFRAC(3)=0.15 ;TFRAC(4)=0.2
TFRAC(5)=0.25 ;TFRAC(6)=0.3
TFRAC(7)=0.35 ;TFRAC(8)=0.4
TFRAC(9)=0.45 ;TFRAC(10)=0.5
TFRAC(11)=0.55 ;TFRAC(12)=0.6
TFRAC(13)=0.65 ;TFRAC(14)=0.7
TFRAC(15)=0.75 ;TFRAC(16)=0.8
TFRAC(17)=0.85 ;TFRAC(18)=0.9
TFRAC(19)=0.95 ;TFRAC(20)=1.
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 50
XULAST =1.
XFRAC(1)=0.02 ;XFRAC(2)=0.04
XFRAC(3)=0.06 ;XFRAC(4)=0.08
XFRAC(5)=0.1 ;XFRAC(6)=0.12
XFRAC(7)=0.14 ;XFRAC(8)=0.16
XFRAC(9)=0.18 ;XFRAC(10)=0.2
XFRAC(11)=0.22 ;XFRAC(12)=0.24
XFRAC(13)=0.26 ;XFRAC(14)=0.28
XFRAC(15)=0.3 ;XFRAC(16)=0.32
XFRAC(17)=0.34 ;XFRAC(18)=0.36
XFRAC(19)=0.38 ;XFRAC(20)=0.4
XFRAC(21)=0.42 ;XFRAC(22)=0.44
XFRAC(23)=0.46 ;XFRAC(24)=0.48
XFRAC(25)=0.5 ;XFRAC(26)=0.52
XFRAC(27)=0.54 ;XFRAC(28)=0.56
XFRAC(29)=0.58 ;XFRAC(30)=0.6
XFRAC(31)=0.62 ;XFRAC(32)=0.64
XFRAC(33)=0.66 ;XFRAC(34)=0.68
XFRAC(35)=0.7 ;XFRAC(36)=0.72
XFRAC(37)=0.74 ;XFRAC(38)=0.76
XFRAC(39)=0.78 ;XFRAC(40)=0.8
XFRAC(41)=0.82 ;XFRAC(42)=0.84
XFRAC(43)=0.86 ;XFRAC(44)=0.88
XFRAC(45)=0.9 ;XFRAC(46)=0.92
XFRAC(47)=0.94 ;XFRAC(48)=0.96
XFRAC(49)=0.98 ;XFRAC(50)=1.
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 50
YVLAST =1.
YFRAC(1)=0.02 ;YFRAC(2)=0.04
YFRAC(3)=0.06 ;YFRAC(4)=0.08
YFRAC(5)=0.1 ;YFRAC(6)=0.12
YFRAC(7)=0.14 ;YFRAC(8)=0.16
YFRAC(9)=0.18 ;YFRAC(10)=0.2
YFRAC(11)=0.22 ;YFRAC(12)=0.24
YFRAC(13)=0.26 ;YFRAC(14)=0.28
YFRAC(15)=0.3 ;YFRAC(16)=0.32
YFRAC(17)=0.34 ;YFRAC(18)=0.36
YFRAC(19)=0.38 ;YFRAC(20)=0.4
YFRAC(21)=0.42 ;YFRAC(22)=0.44
YFRAC(23)=0.46 ;YFRAC(24)=0.48
YFRAC(25)=0.5 ;YFRAC(26)=0.52
YFRAC(27)=0.54 ;YFRAC(28)=0.56
YFRAC(29)=0.58 ;YFRAC(30)=0.6
YFRAC(31)=0.62 ;YFRAC(32)=0.64
YFRAC(33)=0.66 ;YFRAC(34)=0.68
YFRAC(35)=0.7 ;YFRAC(36)=0.72
YFRAC(37)=0.74 ;YFRAC(38)=0.76
YFRAC(39)=0.78 ;YFRAC(40)=0.8
YFRAC(41)=0.82 ;YFRAC(42)=0.84
YFRAC(43)=0.86 ;YFRAC(44)=0.88
YFRAC(45)=0.9 ;YFRAC(46)=0.92
YFRAC(47)=0.94 ;YFRAC(48)=0.96
YFRAC(49)=0.98 ;YFRAC(50)=1.
************************************************************
Group 5. Z-Direction Grid Spacing
PARAB = F
NZ = 1
ZWLAST =1.
ZFRAC(1)=1.
************************************************************
Group 6. Body-Fitted Coordinates
************************************************************
Group 7. Variables: STOREd,SOLVEd,NAMEd
ONEPHS = T
NAME(16)=C1 ;NAME(150)=EXAC
* Y in SOLUTN argument list denotes:
* 1-stored 2-solved 3-whole-field
* 4-point-by-point 5-explicit 6-harmonic averaging
SOLUTN(C1,Y,Y,N,N,N,Y)
SOLUTN(EXAC,Y,N,N,N,N,Y)
************************************************************
Group 8. Terms & Devices
* Y in TERMS argument list denotes:
* 1-built-in source 2-convection 3-diffusion 4-transient
* 5-first phase variable 6-interphase transport
TERMS(C1,N,N,Y,Y,Y,N)
DIFCUT =0.5 ;ZDIFAC =1.
GALA = F ;ADDDIF = F
ISOLX = -1 ;ISOLY = -1 ;ISOLZ = -1
************************************************************
Group 9. Properties used if PRPS is not
stored, and where PRPS = -1.0 if it is!
RHO1 =1. ;TMP1 =0.
EL1 =0.
TSURR =0. ;TEMP0 =0.
PRESS0 =0.
DVO1DT =0. ;DRH1DP =0.
EMISS =0. ;SCATT =0.
ENUL =1. ;ENUT =0.
PRNDTL(C1)=1.
PRT(C1)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(C1)=0. ;FIINIT(EXAC)=1.0E-10
No PATCHes yet used for this Group
FSWEEP = 1
NAMFI =CHAM
************************************************************
Group 12. Patchwise adjustment of terms
Patches for this group are printed with those
for Group 13.
Their names begin either with GP12 or &
************************************************************
Group 13. Boundary & Special Sources

PATCH(WEST ,WWALL , 1, 1, 1, 10, 1, 1, 1, 5)
COVAL(WEST ,C1 ,0. ,0. )

PATCH(EAST ,EWALL , 10, 10, 1, 10, 1, 1, 1, 5)
COVAL(EAST ,C1 ,0. ,0. )

PATCH(SOUTH ,SWALL , 1, 10, 1, 1, 1, 1, 1, 5)
COVAL(SOUTH ,C1 ,0. ,0. )

PATCH(NORTH ,NWALL , 1, 10, 10, 10, 1, 1, 1, 5)
COVAL(NORTH ,C1 ,0. ,0. )

PATCH(IWEST ,WWALL , 1, 1, 1, 50, 1, 1, 1, 20)
COVAL(IWEST ,C1 ,In-Form:source - see Grp 19)

PATCH(IEAST ,EWALL , 50, 50, 1, 50, 1, 1, 1, 20)
COVAL(IEAST ,C1 ,In-Form:source - see Grp 19)

PATCH(ISOUTH ,SWALL , 1, 50, 1, 1, 1, 1, 1, 20)
COVAL(ISOUTH ,C1 ,In-Form:source - see Grp 19)

PATCH(INORTH ,NWALL , 1, 50, 50, 50, 1, 1, 1, 20)
COVAL(INORTH ,C1 ,In-Form:source - see Grp 19)

PATCH(ISOURC ,VOLUME, 1, 50, 1, 50, 1, 1, 1, 20)
COVAL(ISOURC ,C1 ,In-Form:source - see Grp 19)
XCYCLE = F
EGWF = T
WALLCO = GRND2
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 100 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
SELREF = T
RESFAC =1.0E-04
************************************************************
Group 16. Terminate Iterations
LITER(C1)=20
ENDIT(C1)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(C1,FALSDT,1.0E+09)
RELAX(EXAC,LINRLX,1.)
OVRRLX =0.
EXPERT = F ;NNORSL = F
************************************************************
Group 18. Limits
VARMAX(C1)=1.0E+10 ;VARMIN(C1)=-1.0E+10
VARMAX(EXAC)=1.0E+10 ;VARMIN(EXAC)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
PARSOL = F
ISG62 = 1
SPEDAT(SET,GXMONI,TRANSIENT,L,F)
SPEDAT(SET,SOURCE,C1!IWEST,C,=2.*(TIM*YG^2-C1)/DXG!LINE)
SPEDAT(SET,SOURCE,C1!IEAST,C,=2.*(TIM*(1.0+YG^2)-C1)/DXG!LINE)
SPEDAT(SET,SOURCE,C1!ISOUTH,C,=2.*(TIM*XG^2-C1)/DYG!LINE)
SPEDAT(SET,SOURCE,C1!INORTH,C,=2.*(TIM*(1.0+XG^2)-C1)/DYG!LINE)
SPEDAT(SET,SOURCE,C1!ISOURC,C,=XG^2+YG^2-4.*TIM)
SPEDAT(SET,STORED,EXAC,C,=TIM*(XG^2+YG^2)!ZSLFIN)
************************************************************
Group 20. Preliminary Printout
DISTIL = T ;NULLPR = F
NDST = 0
DSTTOL =1.0E-02
EX(C1)=0.6626 ;EX(EXAC)=0.665
************************************************************
Group 21. Print-out of Variables
INIFLD = F ;SUBWGR = F
* Y in OUTPUT argument list denotes:
* 1-field 2-correction-eq. monitor 3-selective dumping
* 4-whole-field residual 5-spot-value table 6-residual table
OUTPUT(C1,Y,N,Y,Y,Y,Y)
OUTPUT(EXAC,Y,N,Y,N,N,N)
************************************************************
Group 22. Monitor Print-Out
IXMON = 1 ;IYMON = 1 ;IZMON = 1
NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = -1
UWATCH = T ;USTEER = T
HIGHLO = F
************************************************************
Group 23.Field Print-Out & Plot Control
NPRINT = 100000 ;NUMCLS = 5
NTPRIN = 100000 ;ISTPRF = 1 ;ISTPRL = 100000
NXPRIN = -1 ;IXPRF = 1 ;IXPRL = 10000
NYPRIN = -1 ;IYPRF = 1 ;IYPRL = 10000
IPLTF = 1 ;IPLTL = -1 ;NPLT = -1
ISWPRF = 1 ;ISWPRL = 100000
ITABL = 3 ;IPROF = 1
ABSIZ =0.5 ;ORSIZ =0.4
NTZPRF = 1 ;NCOLPF = 50
ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20
No PATCHes yet used for this Group
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
STOP
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