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( 2D UNSTEADY DIFFUSION PROBLEM:119      )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 119
 ************************************************************
  Group 2. Time dependence
 STEADY = F
    * Set overall time and no. of steps
 TFIRST =0. ;TLAST =1.
 FSTEP = 1 ;LSTEP = 5
 TFRAC(1)=0.2 ;TFRAC(2)=0.4
 TFRAC(3)=0.6 ;TFRAC(4)=0.8
 TFRAC(5)=1.
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 10
 XULAST =1.
 XFRAC(1)=0.1 ;XFRAC(2)=0.2
 XFRAC(3)=0.3 ;XFRAC(4)=0.4
 XFRAC(5)=0.5 ;XFRAC(6)=0.6
 XFRAC(7)=0.7 ;XFRAC(8)=0.8
 XFRAC(9)=0.9 ;XFRAC(10)=1.
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 10
 YVLAST =1.
 YFRAC(1)=0.1 ;YFRAC(2)=0.2
 YFRAC(3)=0.3 ;YFRAC(4)=0.4
 YFRAC(5)=0.5 ;YFRAC(6)=0.6
 YFRAC(7)=0.7 ;YFRAC(8)=0.8
 YFRAC(9)=0.9 ;YFRAC(10)=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.
 RADIA =0. ;RADIB =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
 INIADD = F
 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 ,1. , GRND )
 
 PATCH(EAST ,EWALL , 10, 10, 1, 10, 1, 1, 1, 5)
 COVAL(EAST ,C1 ,1. , GRND )
 
 PATCH(SOUTH ,SWALL , 1, 10, 1, 1, 1, 1, 1, 5)
 COVAL(SOUTH ,C1 ,1. , GRND )
 
 PATCH(NORTH ,NWALL , 1, 10, 10, 10, 1, 1, 1, 5)
 COVAL(NORTH ,C1 ,1. , GRND )
 
 PATCH(SOURC ,VOLUME, 1, 10, 1, 10, 1, 1, 1, 5)
 COVAL(SOURC ,C1 , 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(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
 NAMSAT =MOSG
 PARSOL = F
 ISG62 = 1
 SPEDAT(SET,GXMONI,TRANSIENT,L,F)
 ************************************************************
  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