TALK=T;RUN(1,1)
  PHOTON USE
  p
  phi
  1 20 1


  msg grid (scale enlarged 20 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;0.1;  gr ou z 1
  msg Press  to continue
  pause;  cl
  msg contours of 1st-phase (vapour) volume fraction
  con gas z 1 fi;0.1;  gr ou z 1
  msg Press  to continue
  pause ;  cl
  msg contours of 2nd-phase (water) enthalpy
  con iliq z 1 fi;0.1;  gr ou z 1
  msg Press e to END
  enduse
  DISPLAY
   NUMERICAL BENCHMARK PROBLEM 3.2: BOILING IN A CHANNEL
   Saturated water enters a duct of uniform rectangular
   cross-section. The first quarter of its length is
   unheated; but heat is supplied to the remainder of the
   pipe at a fixed rate, causing boiling, and a consequent
   acceleration of both liquid and vapour.

   Three cases are considered. In the first, the influence
   of gravity is totally neglected. In the second, the duct
   is vertical, with flow from bottom to top, and the effect
   of gravity is accounted for. In the third, the pipe is
   horizontal, and the effect of gravity is again taken into
   account.

   The task is to predict the distributions of steam and water
   velocities and enthalpies, of pressure, and of volume
   fraction, along the pipe. Special interest attaches to
   comparisons between the three cases.
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(BOILING , LONGITUDINAL GRAVITY :    W898)
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 897
 ************************************************************
  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 =1.0E-02
 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 =1.0E-02
 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 ;NAME(14)=H1
 NAME(15)=ILIQ ;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(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)
 SOLUTN(H1,Y,Y,N,N,N,Y)
 SOLUTN(ILIQ,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(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)
 TERMS(H1,N,Y,Y,Y,Y,Y)
 TERMS(ILIQ,N,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
 PHINT(H1)=2.5E+06 ;PHINT(ILIQ)=4.0E+05
 PRNDTL(U1)=1. ;PRNDTL(AU2)=1.
 PRNDTL(V1)=1. ;PRNDTL(BV2)=1.
 PRNDTL(GAS)=1. ;PRNDTL(LIQ)=1.
 PRNDTL(H1)=1. ;PRNDTL(ILIQ)=1.
 PRT(U1)=1. ;PRT(AU2)=1.
 PRT(V1)=1. ;PRT(BV2)=1.
 PRT(GAS)=1. ;PRT(LIQ)=1.
 PRT(H1)=1. ;PRT(ILIQ)=1.
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 CFIPS =-50.
 RLOLIM =0. ;CMDOT = HEATBL
 CINT(P1)=1. ;CINT(U1)=1.
 CINT(AU2)=1. ;CINT(V1)=1.
 CINT(BV2)=1. ;CINT(GAS)=1.
 CINT(LIQ)=1. ;CINT(H1)=1.0E-02
 CINT(ILIQ)=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 ;PHINT(H1)=2.5E+06
 PHINT(ILIQ)=4.0E+05
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(P1)=1.0E-10 ;FIINIT(U1)=1.0E-02
 FIINIT(AU2)=1.0E-02 ;FIINIT(V1)=1.0E-10
 FIINIT(BV2)=1.0E-10 ;FIINIT(GAS)=1.0E-02
 FIINIT(LIQ)=0.99 ;FIINIT(H1)=2.5E+06
 FIINIT(ILIQ)=4.0E+05 ;FIINIT(MDOT)=0.
   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, 10, 1, 1, 1, 1)
 COVAL(INLET ,U1 ,0. ,0. )
 COVAL(INLET ,AU2 ,0. ,1.0E-02 )
 COVAL(INLET ,V1 ,0. ,0. )
 COVAL(INLET ,BV2 ,0. ,0. )
 COVAL(INLET ,GAS , FIXFLU ,0. )
 COVAL(INLET ,LIQ , FIXFLU ,10. )
 COVAL(INLET ,H1 ,0. ,0. )
 COVAL(INLET ,ILIQ,0. ,4.0E+05 )
 
 PATCH(OUTLET ,CELL , 20, 20, 1, 10, 1, 1, 1, 1)
 COVAL(OUTLET ,U1 ,0. ,0. )
 COVAL(OUTLET ,AU2 ,0. ,0. )
 COVAL(OUTLET ,V1 ,0. ,0. )
 COVAL(OUTLET ,BV2 ,0. ,0. )
 COVAL(OUTLET ,GAS ,1. ,0. )
 COVAL(OUTLET ,LIQ ,1000. ,0. )
 COVAL(OUTLET ,H1 ,0. , SAME )
 COVAL(OUTLET ,ILIQ,0. , SAME )
 
 PATCH(NORTH1 ,PHASEM, 6, 20, 10, 10, 1, 1, 1, 1)
 COVAL(NORTH1 ,ILIQ, FIXFLU ,1.0E+05 )
 
 PATCH(SOUTH1 ,PHASEM, 6, 20, 1, 1, 1, 1, 1, 1)
 COVAL(SOUTH1 ,ILIQ, FIXFLU ,1.0E+05 )
 
 PATCH(NORTH2 ,NORTH , 1, 20, 10, 10, 1, 1, 1, 1)
 COVAL(NORTH2 ,U1 ,-2.0E-03 ,0. )
 COVAL(NORTH2 ,AU2 ,-2.0E-03 ,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 ,U1 , FIXFLU ,-9.81 )
 COVAL(GRAVITY ,AU2 , FIXFLU ,-9.81 )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 500 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 ISWR1 = 1 ;ISWR2 = 10000
 SELREF = T
 RESFAC =1.0E-05
 ************************************************************
  Group 16. Terminate Iterations
 LITER(P1)=20 ;LITER(U1)=20
 LITER(AU2)=20 ;LITER(V1)=1
 LITER(BV2)=1 ;LITER(GAS)=1
 LITER(LIQ)=1 ;LITER(H1)=20
 LITER(ILIQ)=20
 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 ;ENDIT(H1)=1.0E-03
 ENDIT(ILIQ)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(U1,FALSDT,1.)
 RELAX(AU2,FALSDT,0.1)
 RELAX(V1,FALSDT,1.0E-03)
 RELAX(BV2,FALSDT,1.0E-03)
 RELAX(GAS,LINRLX,0.35)
 RELAX(LIQ,LINRLX,0.35)
 RELAX(H1,FALSDT,1.)
 RELAX(ILIQ,FALSDT,0.1)
 RELAX(MDOT,LINRLX,1.)
 OVRRLX =0.
 EXPERT = F ;NNORSL = F
 ************************************************************
  Group 18. Limits
 VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10
 VARMAX(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
 VARMAX(H1)=1.0E+10 ;VARMIN(H1)=-1.0E+10
 VARMAX(ILIQ)=1.0E+10 ;VARMIN(ILIQ)=-1.0E+10
 VARMAX(MDOT)=1.0E+10 ;VARMIN(MDOT)=-1.0E+10
 ************************************************************
  Group 19. Data transmitted to GROUND
 PARSOL = F
 ISG62 = 1
 SPEDAT(SET,GXMONI,PLOTALL,L,T)
 ************************************************************
  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)
 OUTPUT(H1,Y,N,Y,Y,Y,Y)
 OUTPUT(ILIQ,Y,N,Y,Y,Y,Y)
 OUTPUT(MDOT,Y,N,Y,N,N,N)
 ************************************************************
  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 = 4 ;IXPRF = 1 ;IXPRL = 10000
 NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000
 IPLTF = 3 ;IPLTL = 500 ;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(LONGPLOT,PROFIL, 1, 20, 1, 1, 1, 1, 1, 1)
 PLOT(LONGPLOT,P1 ,0. ,0. )
 PLOT(LONGPLOT,U1 ,-1. ,-1. )
 PLOT(LONGPLOT,AU2 ,-1. ,-1. )
 PLOT(LONGPLOT,LIQ ,0. ,0. )
 PLOT(LONGPLOT,MDOT,0. ,0. )
 
 PATCH(MAP ,CONTUR, 1, 20, 1, 10, 1, 1, 1, 1)
 PLOT(MAP ,P1 ,0. ,10. )
 PLOT(MAP ,U1 ,0. ,10. )
 PLOT(MAP ,AU2 ,0. ,10. )
 PLOT(MAP ,GAS ,0. ,10. )
 PLOT(MAP ,LIQ ,0. ,10. )
 PLOT(MAP ,ILIQ,0. ,10. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP