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


  msg grid (scale enlarged 5 times in y direction)
  gr z 1
  msg Press  to continue
  pause
  cl
  msg 1st-phase (vapour) velocity vectors
  vec z 1 sh
  gr ou z 1
  msg Press  to continue
  pause
  cl
  msg 2nd-phase (water) velocity vectors
  set vec comp
  au2 bv2 -
  vec z 1 sh
  gr ou z 1
  msg Press  to continue
  pause
  cl
  msg contours of pressure
  con p1 z 1 fi;0.01
  gr ou z 1
  msg Press  to continue
  pause
  cl
  msg contours of 1st-phase (vapour) volume fraction
  con gas z 1 fi;0.01
  pause
  cl
  msg contours of concentration in 1st phase (vapour)
  con c1 z 1 fi;0.01
  pause
  cl
  msg contours of concentration in 2nd phase (liquid)
  con c2 z 1 fi;0.01
  pause
  cl
  enduse
  display

  Liquid flows steadily along a tray from left to right,
  escaping over a weir.

  Air bubbles up through the tray, escaping freely to atmosphere.

  The task is to predict the thickness and the void fraction of
  the bubbly layer on the tray.

  |
  |-------------------------------_________
  ---> water                   ^           ---------__
  |                          air                     |
  |____________________________|_____________________|
                               |

  A PHOTON use file is provided.
  enddis
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(2D channel flow as in tray column  :W775)
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 14
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 20
 XULAST =1.
 XFRAC(1)=0.05 ;XFRAC(5)=0.25
 XFRAC(9)=0.45 ;XFRAC(13)=0.65
 XFRAC(17)=0.85
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 10
 YVLAST =0.1
 YFRAC(1)=0.031623 ;YFRAC(3)=0.164317
 YFRAC(5)=0.353553 ;YFRAC(7)=0.585662
 YFRAC(9)=0.853815
 ************************************************************
  Group 5. Z-Direction Grid Spacing
 PARAB = F
 NZ = 1
 ZWLAST =0.1
 ZFRAC(1)=1.
 ************************************************************
  Group 6. Body-Fitted Coordinates
 ************************************************************
  Group 7. Variables: STOREd,SOLVEd,NAMEd
 ONEPHS = F
 EQUVEL = F
 NAME(1)=P1 ;NAME(3)=U1
 NAME(4)=AU2 ;NAME(5)=V1
 NAME(6)=BV2 ;NAME(9)=GAS
 NAME(10)=LIQ
    * 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,N,N,Y)
 SOLUTN(AU2,Y,Y,N,N,N,Y)
 SOLUTN(V1,Y,Y,N,N,N,Y)
 SOLUTN(BV2,Y,Y,N,N,N,Y)
 SOLUTN(GAS,Y,Y,N,N,N,Y)
 SOLUTN(LIQ,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(AU2,Y,Y,Y,Y,N,Y)
 TERMS(V1,Y,Y,Y,Y,Y,Y)
 TERMS(BV2,Y,Y,Y,Y,N,Y)
 TERMS(GAS,Y,Y,Y,Y,Y,Y)
 TERMS(LIQ,Y,Y,Y,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-03 ;ENUT =0.
 PHINT(U1)=-2.022E+04 ;PHINT(AU2)=-2.022E+04
 PHINT(V1)=-2.022E+04 ;PHINT(BV2)=-2.022E+04
 PHINT(GAS)=-2.022E+04 ;PHINT(LIQ)=-2.022E+04
 PRNDTL(U1)=1. ;PRNDTL(AU2)=1.
 PRNDTL(V1)=1. ;PRNDTL(BV2)=1.
 PRNDTL(GAS)=1. ;PRNDTL(LIQ)=1.
 PRT(U1)=1. ;PRT(AU2)=1.
 PRT(V1)=1. ;PRT(BV2)=1.
 PRT(GAS)=1. ;PRT(LIQ)=1.
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 CFIPS =-50.
 RLOLIM =0. ;CMDOT =0.
 CINT(P1)=1. ;CINT(U1)=1.
 CINT(AU2)=1. ;CINT(V1)=1.
 CINT(BV2)=1. ;CINT(GAS)=1.
 CINT(LIQ)=1.
 PHINT(P1)=-2.022E+04 ;PHINT(U1)=-2.022E+04
 PHINT(AU2)=-2.022E+04 ;PHINT(V1)=-2.022E+04
 PHINT(BV2)=-2.022E+04 ;PHINT(GAS)=-2.022E+04
 PHINT(LIQ)=-2.022E+04
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(P1)=1.0E-10 ;FIINIT(U1)=0.1
 FIINIT(AU2)=0.1 ;FIINIT(V1)=1.0E-10
 FIINIT(BV2)=1.0E-10 ;FIINIT(GAS)=0.5
 FIINIT(LIQ)=0.5
   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, 5, 1, 1, 1, 1)
 COVAL(INLET ,U1 ,0. ,0. )
 COVAL(INLET ,AU2 ,0. ,0.1 )
 COVAL(INLET ,V1 ,0. ,0. )
 COVAL(INLET ,BV2 ,0. ,0. )
 COVAL(INLET ,GAS , FIXFLU ,0. )
 COVAL(INLET ,LIQ , FIXFLU ,100. )
 
 PATCH(OUTLET ,CELL , 20, 20, 6, 10, 1, 1, 1, 1)
 COVAL(OUTLET ,LIQ ,100. ,0. )
 
 PATCH(SOUTH3 ,SOUTH , 1, 20, 1, 1, 1, 1, 1, 1)
 COVAL(SOUTH3 ,GAS , FIXFLU ,0.1 )
 
 PATCH(NORTH ,NORTH , 1, 16, 10, 10, 1, 1, 1, 1)
 COVAL(NORTH ,GAS ,1. ,0. )
 
 PATCH(SOUTH2 ,SOUTH , 1, 20, 1, 1, 1, 1, 1, 1)
 COVAL(SOUTH2 ,U1 ,-2.0E-03 ,0. )
 COVAL(SOUTH2 ,AU2 ,-2.0E-03 ,0. )
 
 PATCH(GRAVITY ,PHASEM, 1, 20, 1, 10, 1, 1, 1, 1)
 COVAL(GRAVITY ,V1 , FIXFLU ,-9.81 )
 COVAL(GRAVITY ,BV2 , FIXFLU ,-9.81 )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 1000 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 ISWR1 = 1 ;ISWR2 = 10000
 SELREF = T
 RESFAC =1.0E-02
 ************************************************************
  Group 16. Terminate Iterations
 LITER(P1)=20 ;LITER(U1)=2
 LITER(AU2)=2 ;LITER(V1)=2
 LITER(BV2)=2 ;LITER(GAS)=2
 LITER(LIQ)=2
 ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
 ENDIT(AU2)=1.0E-03 ;ENDIT(V1)=1.0E-03
 ENDIT(BV2)=1.0E-03 ;ENDIT(GAS)=1.0E-03
 ENDIT(LIQ)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,0.5)
 RELAX(U1,FALSDT,0.010096)
 RELAX(AU2,FALSDT,1.009638E-03)
 RELAX(V1,FALSDT,1.009638E-03)
 RELAX(BV2,FALSDT,1.009638E-04)
 RELAX(GAS,LINRLX,0.1)
 RELAX(LIQ,LINRLX,0.1)
 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(AU2)=1.0E+06 ;VARMIN(AU2)=-1.0E+06
 VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
 VARMAX(BV2)=1.0E+06 ;VARMIN(BV2)=-1.0E+06
 VARMAX(GAS)=1. ;VARMIN(GAS)=1.0E-06
 VARMAX(LIQ)=1. ;VARMIN(LIQ)=1.0E-06
 ************************************************************
  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,Y,N,Y,Y,Y,Y)
 OUTPUT(U1,Y,N,Y,Y,Y,Y)
 OUTPUT(AU2,Y,N,Y,Y,Y,Y)
 OUTPUT(V1,Y,N,Y,Y,Y,Y)
 OUTPUT(BV2,Y,N,Y,Y,Y,Y)
 OUTPUT(GAS,Y,N,Y,Y,Y,Y)
 OUTPUT(LIQ,Y,N,Y,Y,Y,Y)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 19 ;IYMON = 5 ;IZMON = 1
 NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = -10
 UWATCH = T ;USTEER = T
 HIGHLO = F
 ************************************************************
  Group 23.Field Print-Out & Plot Control
 NPRINT = 100000 ;NUMCLS = 5
 NXPRIN = 4 ;IXPRF = 1 ;IXPRL = 10000
 NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000
 IPLTF = 3 ;IPLTL = 5000 ;NPLT = 50
 ISWPRF = 1 ;ISWPRL = 100000
 ITABL = 1 ;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