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



  msg Temperature contours
  con temp z 1 fi;0.1
  msg
  msg Press return for velocity vectors
  pause;con off; red
  vec z 1 sh
  msg Press return for pressure contours
  pause;vec off; red
  msg
  msg Pressure contours
  con p1 z 1 fi;0.1
  msg Press return for streamlines
  pause;con off;red;stre 2d z 1;int 10
  msg Press e to END
  enduse
  DISPLAY
  ******************************************************************
  *  A horizontal cold pipe, eg containing liquefied natural gas,  *
  *  is insulated by a cylindrical blanket of glass wool, through  *
  *  which air can circulate slowly by natural convection, as a    *
  *  result of which the heat transfer rate is considerably larger *
  *  than if conduction were the only mechanism.                   *
  *                                                                *
  *  The governing dimensionless parameters are:                   *
  *1.The Prandtl number, in which it is the effective conductivity *
  *  of the glass wool which should enter,                         *
  *2.the Rayleigh number, ie                                       *
  *             grav * DVO1DT * deltaT * diam**3/vis**2,           *
  *3.and the ratio of average air-passage width in the glass wool  *
  *  to the pipe diameter.                                         *
  *                                                                *
  *  The values chosen here are Pr = 0.5, Ra = 1.e8, Wi = 1.e-4    *
  *                                                                *
  ******************************************************************
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(Free Convection In A Porous Medium      )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 14
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = F
 NX = 20
 XULAST =3.14159
 XFRAC(1)=0.05 ;XFRAC(6)=0.3
 XFRAC(11)=0.55 ;XFRAC(16)=0.8
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 20
 YVLAST =1.
 RINNER =1. ;SNALFA =0.
 YFRAC(1)=0.05 ;YFRAC(4)=0.2
 YFRAC(7)=0.35 ;YFRAC(10)=0.5
 YFRAC(13)=0.65 ;YFRAC(16)=0.8
 YFRAC(19)=0.95
 ************************************************************
  Group 5. Z-Direction Grid Spacing
 PARAB = F
 NZ = 1
 ZWLAST =1.1054
 ZFRAC(1)=1.
 ************************************************************
  Group 6. Body-Fitted Coordinates
 ************************************************************
  Group 7. Variables: STOREd,SOLVEd,NAMEd
 ONEPHS = T
 NAME(1)=P1 ;NAME(3)=U1
 NAME(5)=V1 ;NAME(14)=TEMP
    * Y in SOLUTN argument list denotes:
    * 1-stored 2-solved 3-whole-field
    * 4-point-by-point 5-explicit 6-harmonic averaging 
 SOLUTN(P1,Y,Y,N,N,N,Y)
 SOLUTN(U1,Y,Y,N,Y,N,Y)
 SOLUTN(V1,Y,Y,N,Y,N,Y)
 SOLUTN(TEMP,Y,Y,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(P1,Y,Y,Y,N,Y,Y)
 TERMS(U1,Y,Y,Y,Y,Y,Y)
 TERMS(V1,Y,Y,Y,Y,Y,Y)
 TERMS(TEMP,N,Y,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 =0.
 EL1 =0.
 TSURR =0. ;TEMP0 =0.
 PRESS0 =0.
 DVO1DT =2.0E+07 ;DRH1DP =0.
 EMISS =0. ;SCATT =0.
 RADIA =0. ;RADIB =0.
 ENUL =1. ;ENUT =0.
 PRNDTL(U1)=1. ;PRNDTL(V1)=1.
 PRNDTL(TEMP)=5.
 PRT(U1)=1. ;PRT(V1)=1.
 PRT(TEMP)=1.
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(P1)=0. ;FIINIT(U1)=0.
 FIINIT(V1)=0. ;FIINIT(TEMP)=0.4
   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(INNERWAL,SWALL , 1, 20, 1, 1, 1, 1, 1, 1)
 COVAL(INNERWAL,U1 ,1. ,0. )
 COVAL(INNERWAL,TEMP,1. ,0. )
 
 PATCH(OUTERWAL,NWALL , 1, 20, 20, 20, 1, 1, 1, 1)
 COVAL(OUTERWAL,U1 ,1. ,0. )
 COVAL(OUTERWAL,TEMP,1. ,1. )
 
 PATCH(PRELIEF ,CELL , 10, 10, 1, 1, 1, 1, 1, 1)
 COVAL(PRELIEF ,P1 ,1. ,0. )
 COVAL(PRELIEF ,TEMP,0. , SAME )
 
 PATCH(BUOYANCY,VOLUME, 1, 20, 1, 20, 1, 1, 1, 1)
 COVAL(BUOYANCY,U1 , FIXFLU , GRND3 )
 COVAL(BUOYANCY,V1 , FIXFLU , GRND3 )
 
 PATCH(MEDIUM ,VOLUME, 1, 20, 1, 20, 1, 1, 1, 1)
 COVAL(MEDIUM ,U1 ,5000. ,0. )
 COVAL(MEDIUM ,V1 ,5000. ,0. )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 BUOYA =0. ; BUOYB =-1.
 BUOYC =0.
 BUOYD =2.0E+07
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 200 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 SELREF = T
 RESFAC =0.1
 ************************************************************
  Group 16. Terminate Iterations
 LITER(P1)=100 ;LITER(U1)=10
 LITER(V1)=10 ;LITER(TEMP)=10
 ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
 ENDIT(V1)=1.0E-03 ;ENDIT(TEMP)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(U1,FALSDT,9.999E-06)
 RELAX(V1,FALSDT,9.999E-06)
 RELAX(TEMP,FALSDT,1.0E+09)
 OVRRLX =0.
 EXPERT = F ;NNORSL = F
 ************************************************************
  Group 18. Limits
 VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10
 VARMAX(U1)=1.0E+06 ;VARMIN(U1)=-1.0E+06
 VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
 VARMAX(TEMP)=1.0E+10 ;VARMIN(TEMP)=-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(P1,N,Y,Y,Y,Y,Y)
 OUTPUT(U1,N,Y,Y,Y,Y,Y)
 OUTPUT(V1,N,Y,Y,Y,Y,Y)
 OUTPUT(TEMP,N,Y,Y,Y,Y,Y)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 10 ;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 = 5 ;IXPRF = 1 ;IXPRL = 10000
 NYPRIN = 3 ;IYPRF = 1 ;IYPRL = 10000
 IPLTF = 1 ;IPLTL = 200 ;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
 
 PATCH(TX1 ,PROFIL, 1, 1, 1, 20, 1, 1, 1, 1)
 PLOT(TX1 ,TEMP,0. ,0. )
 
 PATCH(TNX ,PROFIL, 20, 20, 1, 20, 1, 1, 1, 1)
 PLOT(TNX ,TEMP,0. ,0. )
 
 PATCH(TNX2 ,PROFIL, 10, 10, 1, 20, 1, 1, 1, 1)
 PLOT(TNX2 ,U1 ,0. ,0. )
 PLOT(TNX2 ,TEMP,0. ,0. )
 
 PATCH(TCON ,CONTUR, 1, 30, 1, 30, 1, 1, 1, 1)
 PLOT(TCON ,TEMP,0. ,20. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP