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

gr ou z 1
msg           Temperature contours
msg           (Numerical solution)
con h1 z 1 fi;0.001
msg Press Enter to continue
pause
con off;red
con exac z 1 fi;0.001
msg           Temperature contours
msg             (Exact solution)
msg Press e to END
ENDUSE
DISPLAY
PLANT solves a two-dimensional steady diffusion problem  with
space-dependent  source and boundary conditions.
It can be tested against exact solution  fields.

Governing equation:
d(dT/dX)/dX + d(dT/dX)/dX +  S(X,Y)  =  0
S(X,Y)  =  2.sinX.sinY
Boundary  conditions:
Y = 0 ;  T = 0
Y = 1 ;  T = sin1.sinX
X = 0 ;  T = 0
X = 1 ;  T = sin1.sinY
Exact solution:
T(X,Y) = sinX.sinY

ENDDIS
PLANTBEGIN
** H1=sin1.sinX at Y=1
PATCH(YEQ1,NWALL,1,NX,NY,NY,1,1,1,1)
VAL=SIN(1.)*SIN(XG2D)
COVAL(YEQ1,H1,1./PRNDTL(H1),GRND)
** H1=sin1.sinY at X=1
PATCH(XEQ1,EWALL,NX,NX,1,NY,1,1,1,1)
VAL=SIN(1.)*SIN(YG2D)
COVAL(XEQ1,H1,1./PRNDTL(H1),GRND)
** Space dependent source
PATCH(SOURCE,VOLUME,1,NX,1,NY,1,1,1,1)
VAL=2.*SIN(XG2D)*SIN(YG2D)
COVAL(SOURCE,H1,FIXFLU,GRND)

STORE(EXAC)
EXAC=SIN(XG2D)*SIN(YG2D)
PLANTEND
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************

TEXT(2D HEAT CONDUCTION WITH SPACE DEPENDENT )

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

IRUNN = 1 ;LIBREF = 117
************************************************************
Group 2. Time dependence
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 25
XULAST =1.
XFRAC(1)=0.04 ;XFRAC(6)=0.24
XFRAC(11)=0.44 ;XFRAC(16)=0.64
XFRAC(21)=0.84
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 25
YVLAST =1.
YFRAC(1)=0.04 ;YFRAC(6)=0.24
YFRAC(11)=0.44 ;YFRAC(16)=0.64
YFRAC(21)=0.84
************************************************************
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(14)=H1 ;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(H1,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(H1,N,N,Y,N,Y,Y)
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(H1)=1.
PRT(H1)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(H1)=1.0E-10 ;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(XEQ0 ,WWALL , 1, 1, 1, 25, 1, 1, 1, 1)
COVAL(XEQ0 ,H1 ,1. ,0. )

PATCH(YEQ0 ,SWALL , 1, 25, 1, 1, 1, 1, 1, 1)
COVAL(YEQ0 ,H1 ,1. ,0. )

PATCH(YEQ1 ,NWALL , 1, 25, 25, 25, 1, 1, 1, 1)
COVAL(YEQ1 ,H1 ,1. , GRND )

PATCH(XEQ1 ,EWALL , 25, 25, 1, 25, 1, 1, 1, 1)
COVAL(XEQ1 ,H1 ,1. , GRND )

PATCH(SOURCE ,VOLUME, 1, 25, 1, 25, 1, 1, 1, 1)
COVAL(SOURCE ,H1 , FIXFLU , GRND )
XCYCLE = F
EGWF = T
WALLCO = GRND2
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 10 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
SELREF = T
RESFAC =1.0E-04
************************************************************
Group 16. Terminate Iterations
LITER(H1)=20
ENDIT(H1)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(H1,FALSDT,1.0E+09)
RELAX(EXAC,LINRLX,1.)
OVRRLX =0.
EXPERT = F ;NNORSL = F
************************************************************
Group 18. Limits
VARMAX(H1)=1.0E+10 ;VARMIN(H1)=-1.0E+10
VARMAX(EXAC)=1.0E+10 ;VARMIN(EXAC)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
NAMSAT =MOSG
PARSOL = F
ISG62 = 1
************************************************************
Group 20. Preliminary Printout
DISTIL = T ;NULLPR = F
NDST = 0
DSTTOL =1.0E-02
EX(H1)=0.2114 ;EX(EXAC)=0.2114
************************************************************
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(H1,Y,Y,Y,Y,Y,Y)
OUTPUT(EXAC,Y,N,Y,N,N,N)
************************************************************
Group 22. Monitor Print-Out
IXMON = 13 ;IYMON = 13 ;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
NXPRIN = 5 ;IXPRF = 1 ;IXPRL = 10000
NYPRIN = 5 ;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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