TALK=T;RUN(1,1)
  PHOTON USE
  AUTOPLOT
  file
  phi 5

  da 1
  p1
  screen
  msg pressure profile
  pl 1
  msg press  to continue
  pause
  cl
  da 1
  1u 1 19
  screen
  msg gas velocity
  pl 1
  msg press  to continue
  pause
  cl
  da 1
  gas
  screen
  msg gas volume fraction
  pl 1
  msg press  to continue
  pause
  cl
  da 1
  h2
  screen
  msg liquid enthalpy
  pl 1
  msg press e to END
  enduse
  DISPLAY
  A liquid flows into the bottom of a vertical pipe at the
  saturation temperature. Heat is added in the upper half of the
  pipe,causing steam to be formed. There is a small amount of
  interphase friction. The treatment is one-dimensional.

    Despite the simplicity of its formulation, this is a difficult
  phenomenon to simulate. For cases of this type, a steady-state
  solution may not exist for all conditions; unstable or
  oscillatory boiling is often observed in reality.
  It is interesting to explore how sensitive the solution is to the
  various relaxation parameters, and see whether the same values
  are satisfactory also for different values of heat flux, density
  ratio, gravitational acceleration, interphase-friction law, etc
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(1D STEADY BOILING IN PIPE:          W350)
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 0
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 20
 XULAST =1.
 XFRAC(1)=0.05 ;XFRAC(2)=0.1
 XFRAC(3)=0.15 ;XFRAC(4)=0.2
 XFRAC(5)=0.25 ;XFRAC(6)=0.3
 XFRAC(7)=0.35 ;XFRAC(8)=0.4
 XFRAC(9)=0.45 ;XFRAC(10)=0.5
 XFRAC(11)=0.55 ;XFRAC(12)=0.6
 XFRAC(13)=0.65 ;XFRAC(14)=0.7
 XFRAC(15)=0.75 ;XFRAC(16)=0.8
 XFRAC(17)=0.85 ;XFRAC(18)=0.9
 XFRAC(19)=0.95 ;XFRAC(20)=1.
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 1
 YVLAST =1.
 YFRAC(1)=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 = F
 EQUVEL = F
 NAME(1)=P1 ;NAME(3)=1U
 NAME(4)=2U ;NAME(9)=GAS
 NAME(10)=LIQ ;NAME(14)=H1
 NAME(15)=H2 ;NAME(150)=MDOT
    * 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(1U,Y,Y,N,N,N,Y)
 SOLUTN(2U,Y,Y,N,N,N,Y)
 SOLUTN(GAS,Y,Y,N,N,N,Y)
 SOLUTN(LIQ,Y,Y,N,N,N,Y)
 SOLUTN(H1,Y,Y,N,N,N,Y)
 SOLUTN(H2,Y,Y,N,N,N,Y)
 SOLUTN(MDOT,Y,N,N,N,N,Y)
 INTMDT = 150
 ************************************************************
  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(1U,Y,Y,N,Y,Y,Y)
 TERMS(2U,Y,Y,N,Y,N,Y)
 TERMS(GAS,Y,Y,N,Y,Y,Y)
 TERMS(LIQ,Y,Y,N,Y,N,Y)
 TERMS(H1,N,Y,N,Y,Y,Y)
 TERMS(H2,N,Y,N,Y,N,Y)
 DIFCUT =0.5 ;ZDIFAC =1.
 GALA = F ;ADDDIF = F
 EQDVDP = 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.
 RHO2 =1000. ;TMP2 =0.
 EL2 =0.
 DVO2DT =0. ;DRH2DP =0.
 ENUL =1.0E-05 ;ENUT =0.
 PHINT(1U)=-2.022E+04 ;PHINT(2U)=-2.022E+04
 PHINT(GAS)=-2.022E+04 ;PHINT(LIQ)=-2.022E+04
 PHINT(H1)=2.5E+06 ;PHINT(H2)=4.0E+05
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 CFIPS =-2500.
 RLOLIM =1.0E-02 ;CMDOT = HEATBL
 CINT(P1)=1. ;CINT(1U)=1.
 CINT(2U)=1. ;CINT(GAS)=1.
 CINT(LIQ)=1. ;CINT(H1)=1.0E-02
 CINT(H2)=1.
 PHINT(P1)=-2.022E+04 ;PHINT(1U)=-2.022E+04
 PHINT(2U)=-2.022E+04 ;PHINT(GAS)=-2.022E+04
 PHINT(LIQ)=-2.022E+04 ;PHINT(H1)=2.5E+06
 PHINT(H2)=4.0E+05
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(P1)=1.0E-10 ;FIINIT(1U)=1.0E-02
 FIINIT(2U)=1.0E-02 ;FIINIT(GAS)=1.0E-02
 FIINIT(LIQ)=0.99 ;FIINIT(H1)=2.5E+06
 FIINIT(H2)=4.0E+05 ;FIINIT(MDOT)=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(INLET ,WEST , 1, 1, 1, 1, 1, 1, 1, 1)
 COVAL(INLET ,1U ,0. ,0. )
 COVAL(INLET ,2U ,0. ,1.0E-02 )
 COVAL(INLET ,GAS , FIXFLU ,0. )
 COVAL(INLET ,LIQ , FIXFLU ,10. )
 COVAL(INLET ,H1 ,0. ,0. )
 COVAL(INLET ,H2 ,0. ,4.0E+05 )
 
 PATCH(OUTLET ,CELL , 20, 20, 1, 1, 1, 1, 1, 1)
 COVAL(OUTLET ,1U ,0. ,0. )
 COVAL(OUTLET ,2U ,0. ,0. )
 COVAL(OUTLET ,GAS ,1. ,0. )
 COVAL(OUTLET ,LIQ ,1000. ,0. )
 COVAL(OUTLET ,H1 ,0. , SAME )
 COVAL(OUTLET ,H2 ,0. , SAME )
 
 PATCH(GRAVITY ,PHASEM, 1, 20, 1, 1, 1, 1, 1, 1)
 COVAL(GRAVITY ,1U , FIXFLU ,-9.81 )
 COVAL(GRAVITY ,2U , FIXFLU ,-9.81 )
 
 PATCH(HEATER ,PHASEM, 6, 20, 1, 1, 1, 1, 1, 1)
 COVAL(HEATER ,H2 , FIXFLU ,1.0E+05 )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 200 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 ISWR1 = 1 ;ISWR2 = 10000
 SELREF = T
 RESFAC =1.0E-04
 ************************************************************
  Group 16. Terminate Iterations
 LITER(P1)=20 ;LITER(1U)=10
 LITER(2U)=10 ;LITER(GAS)=1
 LITER(LIQ)=1 ;LITER(H1)=20
 LITER(H2)=20
 ENDIT(P1)=1.0E-03 ;ENDIT(1U)=1.0E-03
 ENDIT(2U)=1.0E-03 ;ENDIT(GAS)=1.0E-03
 ENDIT(LIQ)=1.0E-03 ;ENDIT(H1)=1.0E-03
 ENDIT(H2)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(1U,FALSDT,0.1)
 RELAX(2U,FALSDT,0.1)
 RELAX(GAS,LINRLX,0.1)
 RELAX(LIQ,LINRLX,0.1)
 RELAX(H1,FALSDT,1.)
 RELAX(H2,FALSDT,1.)
 RELAX(MDOT,LINRLX,1.)
 OVRRLX =0.
 EXPERT = F ;NNORSL = F
 ************************************************************
  Group 18. Limits
 VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10
 VARMAX(1U)=1.0E+06 ;VARMIN(1U)=-1.0E+06
 VARMAX(2U)=1.0E+06 ;VARMIN(2U)=-1.0E+06
 VARMAX(GAS)=1. ;VARMIN(GAS)=1.0E-06
 VARMAX(LIQ)=1. ;VARMIN(LIQ)=1.0E-06
 VARMAX(H1)=1.0E+10 ;VARMIN(H1)=-1.0E+10
 VARMAX(H2)=1.0E+10 ;VARMIN(H2)=-1.0E+10
 VARMAX(MDOT)=1.0E+10 ;VARMIN(MDOT)=-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,N,N,Y,Y,Y)
 OUTPUT(1U,N,N,N,Y,Y,Y)
 OUTPUT(2U,N,N,N,Y,Y,Y)
 OUTPUT(GAS,N,N,N,Y,Y,Y)
 OUTPUT(LIQ,N,N,N,Y,Y,Y)
 OUTPUT(H1,N,N,N,Y,N,N)
 OUTPUT(H2,N,N,N,Y,N,N)
 OUTPUT(MDOT,N,N,N,N,N,N)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 10 ;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
 NXPRIN = 1 ;IXPRF = 1 ;IXPRL = 10000
 IPLTF = 1 ;IPLTL = -1 ;NPLT = 10
 ISWPRF = 1 ;ISWPRL = 100000
 ITABL = 2 ;IPROF = 3
 ABSIZ =0.5 ;ORSIZ =0.4
 NTZPRF = 1 ;NCOLPF = 50
 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20
 
 PATCH(LONGPLOT,PROFIL, 1, 20, 1, 1, 1, 1, 1, 1)
 PLOT(LONGPLOT,1U ,0. ,2. )
 PLOT(LONGPLOT,2U ,0. ,2. )
 PLOT(LONGPLOT,LIQ ,0. ,1. )
 PLOT(LONGPLOT,MDOT,0. ,0.3 )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP