TALK=T;RUN(1,1)
  photon use
  p;;;;;

  msg The grid
  gr z 1 ;pause;gr off;red; gr ou z 1
  msg Contours of RADX
  con radx z 1 fi;0.001;pause;con off;red
  msg Contours of RADY
  con rady z 1 fi;0.001;pause;con off;red
  msg Contours of H1
  con h1 z 1 fi;0.001;pause;con off;red
  enduse
  DISPLAY
    Radiative heat transfer takes place in a 2D box, which
    contains a semi-transparent medium at rest.

    The east and north walls are at a temperature TCOLD;
    the west and south  walls have temperatures THOT1 in their
    first halves and THOT2 in their second halves.

    THOT2 > THOT1 > TCOLD.

    The solved-for variables are temperature and two radiation
    quantities, namely the composite fluxes in the X and Y
    directions, with the asumptions of the four-flux model.
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(2D Radiant Heat Transfer In A Box       )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 14
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 10
 XULAST =1.
 XFRAC(1)=0.1 ;XFRAC(3)=0.3
 XFRAC(5)=0.5 ;XFRAC(7)=0.7
 XFRAC(9)=0.9
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 10
 YVLAST =1.
 YFRAC(1)=0.1 ;YFRAC(3)=0.3
 YFRAC(5)=0.5 ;YFRAC(7)=0.7
 YFRAC(9)=0.9
 ************************************************************
  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(149)=RADX
 NAME(150)=RADY
    * 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(RADX,Y,Y,N,N,N,N)
 SOLUTN(RADY,Y,Y,N,N,N,N)
 ************************************************************
  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,Y,Y,Y)
 TERMS(RADX,N,N,Y,N,Y,N)
 TERMS(RADY,N,N,Y,N,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 = GRND2
 EL1 =0.
 TSURR =0. ;TEMP0 =0.
 PRESS0 =0.
 DVO1DT =0. ;DRH1DP =0.
 TMP1A =0. ;TMP1B =1.
 TMP1C =0.
 TMP2A =0. ;TMP2B =0.
 TMP2C =0.
 EMISS =0. ;SCATT =0.
 RADIA =0.3 ;RADIB =0.05
 ENUL =1.0E-05 ;ENUT =0.
 PRNDTL(H1)=0.7 ;PRNDTL(RADX)=-GRND1
 PRNDTL(RADY)=-GRND1
 PRT(H1)=1. ;PRT(RADX)=1.0E+10
 PRT(RADY)=1.0E+10
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(H1)=479.5 ;FIINIT(RADX)=2997.19165
 FIINIT(RADY)=2997.19165
   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(RADISO ,FREEVL, 0, 0, 0, 0, 0, 0, 1, 1)
 COVAL(RADISO ,H1 , GRND1 , GRND1 )
 COVAL(RADISO ,RADX, GRND1 , GRND1 )
 COVAL(RADISO ,RADY, GRND1 , GRND1 )
 
 PATCH(HOTW1R ,WEST , 1, 1, 1, 5, 1, 1, 1, 1)
 COVAL(HOTW1R ,RADX,0.818182 ,1.115468E+04 )
 
 PATCH(HOTW2R ,WEST , 1, 1, 6, 10, 1, 1, 1, 1)
 COVAL(HOTW2R ,RADX,0.818182 ,2.066542E+04 )
 
 PATCH(COLDER ,EAST , 10, 10, 1, 10, 1, 1, 1, 1)
 COVAL(COLDER ,RADX,0.818182 ,417.859772 )
 
 PATCH(HOTS1R ,SOUTH , 1, 5, 1, 1, 1, 1, 1, 1)
 COVAL(HOTS1R ,RADY,0.818182 ,1.115468E+04 )
 
 PATCH(HOTS2R ,SOUTH , 6, 10, 1, 1, 1, 1, 1, 1)
 COVAL(HOTS2R ,RADY,0.818182 ,2.066542E+04 )
 
 PATCH(COLDNR ,NORTH , 1, 10, 10, 10, 1, 1, 1, 1)
 COVAL(COLDNR ,RADY,0.818182 ,417.859772 )
 
 PATCH(HOTW1H ,WEST , 1, 1, 1, 5, 1, 1, 1, 1)
 COVAL(HOTW1H ,H1 ,1. ,666. )
 
 PATCH(HOTW2H ,WEST , 1, 1, 6, 10, 1, 1, 1, 1)
 COVAL(HOTW2H ,H1 ,1. ,777. )
 
 PATCH(COLDEH ,EAST , 10, 10, 1, 10, 1, 1, 1, 1)
 COVAL(COLDEH ,H1 ,1. ,293. )
 
 PATCH(HOTS1H ,SOUTH , 1, 10, 1, 1, 1, 1, 1, 1)
 COVAL(HOTS1H ,H1 ,1. ,666. )
 
 PATCH(HOTS2H ,SOUTH , 6, 10, 1, 1, 1, 1, 1, 1)
 COVAL(HOTS2H ,H1 ,1. ,777. )
 
 PATCH(COLDNH ,NORTH , 1, 10, 10, 10, 1, 1, 1, 1)
 COVAL(COLDNH ,H1 ,1. ,293. )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 30 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 SELREF = T
 RESFAC =0.1
 ************************************************************
  Group 16. Terminate Iterations
 LITER(H1)=20 ;LITER(RADX)=2
 LITER(RADY)=2
 ENDIT(H1)=1.0E-03 ;ENDIT(RADX)=1.0E-03
 ENDIT(RADY)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(H1,FALSDT,1.0E-02)
 RELAX(RADX,FALSDT,1.)
 RELAX(RADY,FALSDT,1.)
 OVRRLX =0.
 EXPERT = F ;NNORSL = F
 ************************************************************
  Group 18. Limits
 VARMAX(H1)=1.0E+10 ;VARMIN(H1)=-1.0E+10
 VARMAX(RADX)=1.0E+10 ;VARMIN(RADX)=-1.0E+10
 VARMAX(RADY)=1.0E+10 ;VARMIN(RADY)=-1.0E+10
 ************************************************************
  Group 19. Data transmitted to GROUND
 PARSOL = F
 ISG62 = 1
 ************************************************************
  Group 20. Preliminary Printout
 ************************************************************
  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(RADX,Y,N,Y,Y,Y,Y)
 OUTPUT(RADY,Y,N,Y,Y,Y,Y)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 5 ;IYMON = 5 ;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 = 2 ;IXPRF = 1 ;IXPRL = 10000
 NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000
 IPLTF = 1 ;IPLTL = -1 ;NPLT = 2
 ISWPRF = 1 ;ISWPRL = 100000
 ITABL = 3 ;IPROF = 1
 ABSIZ =0.5 ;ORSIZ =0.4
 NTZPRF = 1 ;NCOLPF = 50
 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20
 
 PATCH(DOMAIN ,CONTUR, 1, 10, 1, 10, 1, 1, 1, 1)
 PLOT(DOMAIN ,H1 ,0. ,10. )
 PLOT(DOMAIN ,RADX,0. ,10. )
 PLOT(DOMAIN ,RADY,0. ,10. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP