```
TALK=T;RUN(1,1)
PHOTON USE
P

gr ou x 1
set vec ref 1.
vec x 1 sh
msg(             Water velocity distribution
msg( Press ENTER to continue
pause;
vec off;red
set vec comp - v2 w2
vec x 1 sh
msg(             Air velocity distribution
msg( Press ENTER to continue
pause;
vec off;red
con r2 x 1 1 z 1 19 fil;.0001
msg(             Air volume fraction contours
msg( Press E to finish
ENDUSE
DISPLAY
This problem  is  concerned with the prediction of lateral phase
distribution for a bubbly flow in a duct. The phase distribution
is  caused  by  the interaction of gravity and lift forces.  The
latters  are  introduced  by  PLANT  options.  The   interesting
variants  include  the changing in gravity directions to see how
the bubbles accumulate near the walls for the upflow  situation,
while  they  accumulate near the center of the duct for the down
flow case.  Note that some uderrelaxation adjustments  could  be
used to accelerate the convergence.
ENDDIS
PLANTBEGIN
** Lift force
PATCH(LIFT,VOLUME,1,NX,1,NY,1,NZ,1,LSTEP)
VAL=RG(1)*R2*(W2-W1)*(NORTH(W1)-W1)/DYG2D
COVAL(LIFT,V1,FIXFLU,GRND)
VAL=RG(1)*R2*(W1-W2)*(NORTH(W1)-W1)/DYG2D
COVAL(LIFT,V2,FIXFLU,GRND)
PLANTEND
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************

TEXT(PHASE DISTRIBUTION IN A DUCT:143        )

************************************************************
************************************************************

IRUNN = 1 ;LIBREF = 143
************************************************************
Group 2. Time dependence
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 1
XULAST =1.
XFRAC(1)=1.
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 10
YVLAST =0.025
YFRAC(1)=0.1 ;YFRAC(2)=0.2
YFRAC(3)=0.3 ;YFRAC(4)=0.4
YFRAC(5)=0.5 ;YFRAC(6)=0.6
YFRAC(7)=0.7 ;YFRAC(8)=0.8
YFRAC(9)=0.9 ;YFRAC(10)=1.
************************************************************
Group 5. Z-Direction Grid Spacing
PARAB = F
NZ = 20
ZWLAST =0.25
ZFRAC(1)=0.05 ;ZFRAC(2)=0.1
ZFRAC(3)=0.15 ;ZFRAC(4)=0.2
ZFRAC(5)=0.25 ;ZFRAC(6)=0.3
ZFRAC(7)=0.35 ;ZFRAC(8)=0.4
ZFRAC(9)=0.45 ;ZFRAC(10)=0.5
ZFRAC(11)=0.55 ;ZFRAC(12)=0.6
ZFRAC(13)=0.65 ;ZFRAC(14)=0.7
ZFRAC(15)=0.75 ;ZFRAC(16)=0.8
ZFRAC(17)=0.85 ;ZFRAC(18)=0.9
ZFRAC(19)=0.95 ;ZFRAC(20)=1.
************************************************************
Group 6. Body-Fitted Coordinates
************************************************************
Group 7. Variables: STOREd,SOLVEd,NAMEd
ONEPHS = F
EQUVEL = F
NAME(1)=P1 ;NAME(5)=V1
NAME(6)=V2 ;NAME(7)=W1
NAME(8)=W2 ;NAME(9)=R1
NAME(10)=R2
* 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(V1,Y,Y,N,N,N,Y)
SOLUTN(V2,Y,Y,N,N,N,Y)
SOLUTN(W1,Y,Y,N,N,N,Y)
SOLUTN(W2,Y,Y,N,N,N,Y)
SOLUTN(R1,Y,Y,N,N,N,Y)
SOLUTN(R2,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(V1,Y,Y,Y,N,Y,Y)
TERMS(V2,Y,Y,N,N,N,Y)
TERMS(W1,Y,Y,Y,N,Y,Y)
TERMS(W2,Y,Y,N,N,N,Y)
TERMS(R1,Y,Y,Y,Y,Y,Y)
TERMS(R2,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 =1000. ;TMP1 =0.
EL1 =0.
TSURR =0. ;TEMP0 =0.
PRESS0 =0.
DVO1DT =0. ;DRH1DP =0.
EMISS =0. ;SCATT =0.
RHO2 =1. ;TMP2 =0.
EL2 =0.
DVO2DT =0. ;DRH2DP =0.
ENUL =1.0E-04 ;ENUT =0.
PHINT(V1)=-2.022E+04 ;PHINT(V2)=-2.022E+04
PHINT(W1)=-2.022E+04 ;PHINT(W2)=-2.022E+04
PHINT(R1)=-2.022E+04 ;PHINT(R2)=-2.022E+04
PRNDTL(V1)=1. ;PRNDTL(W1)=1.
PRNDTL(R1)=1. ;PRNDTL(R2)=1.
PRT(V1)=1. ;PRT(W1)=1.
PRT(R1)=1. ;PRT(R2)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
CFIPS =100.
RLOLIM =0. ;CMDOT =0.
CINT(P1)=1. ;CINT(V1)=1.
CINT(V2)=1. ;CINT(W1)=1.
CINT(W2)=1. ;CINT(R1)=1.
CINT(R2)=1.
PHINT(P1)=-2.022E+04 ;PHINT(V1)=-2.022E+04
PHINT(V2)=-2.022E+04 ;PHINT(W1)=-2.022E+04
PHINT(W2)=-2.022E+04 ;PHINT(R1)=-2.022E+04
PHINT(R2)=-2.022E+04
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(P1)=1.0E-10 ;FIINIT(V1)=1.0E-10
FIINIT(V2)=1.0E-10 ;FIINIT(W1)=0.5
FIINIT(W2)=0.5 ;FIINIT(R1)=0.9
FIINIT(R2)=0.1
No PATCHes yet used for this Group
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 ,LOW , 1, 1, 1, 10, 1, 1, 1, 1)
COVAL(INLET ,W1 ,0. ,0.5 )
COVAL(INLET ,W2 ,0. ,0.5 )
COVAL(INLET ,R1 , FIXFLU ,450. )
COVAL(INLET ,R2 , FIXFLU ,0.05 )

PATCH(WALL ,NWALL , 1, 1, 10, 10, 1, 20, 1, 1)
COVAL(WALL ,W1 ,1. ,0. )

PATCH(EXIT ,HIGH , 1, 1, 1, 10, 20, 20, 1, 1)
COVAL(EXIT ,R1 ,1000. ,0. )
COVAL(EXIT ,R2 ,1. ,0. )

PATCH(GRAVITY ,PHASEM, 1, 1, 1, 10, 1, 20, 1, 1)
COVAL(GRAVITY ,W1 , FIXFLU ,-9.81 )
COVAL(GRAVITY ,W2 , FIXFLU ,-9.81 )

PATCH(LIFT ,VOLUME, 1, 1, 1, 10, 1, 20, 1, 1)
COVAL(LIFT ,V1 , FIXFLU , GRND )
COVAL(LIFT ,V2 , FIXFLU , GRND )
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(V1)=10
LITER(V2)=10 ;LITER(W1)=10
LITER(W2)=10 ;LITER(R1)=1
LITER(R2)=1
ENDIT(P1)=1.0E-03 ;ENDIT(V1)=1.0E-03
ENDIT(V2)=1.0E-03 ;ENDIT(W1)=1.0E-03
ENDIT(W2)=1.0E-03 ;ENDIT(R1)=1.0E-03
ENDIT(R2)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(P1,LINRLX,0.5)
RELAX(V1,FALSDT,0.1)
RELAX(V2,FALSDT,0.1)
RELAX(W1,FALSDT,0.1)
RELAX(W2,FALSDT,0.1)
RELAX(R1,LINRLX,0.5)
RELAX(R2,LINRLX,0.5)
OVRRLX =0.
EXPERT = F ;NNORSL = F
************************************************************
Group 18. Limits
VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10
VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
VARMAX(V2)=1.0E+06 ;VARMIN(V2)=-1.0E+06
VARMAX(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06
VARMAX(W2)=1.0E+06 ;VARMIN(W2)=-1.0E+06
VARMAX(R1)=1. ;VARMIN(R1)=1.0E-06
VARMAX(R2)=1. ;VARMIN(R2)=1.0E-06
************************************************************
Group 19. Data transmitted to GROUND
NAMSAT =MOSG
PARSOL = F
ISG62 = 1
RG( 1) =20.
RG( 3) =0.02
************************************************************
Group 20. Preliminary Printout
DISTIL = T ;NULLPR = F
NDST = 0
DSTTOL =1.0E-02
EX(P1)=1108. ;EX(V1)=5.782E-03
EX(V2)=5.586E-03 ;EX(W1)=0.4913
EX(W2)=0.5943 ;EX(R1)=0.9144
EX(R2)=0.08557
************************************************************
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(V1,Y,N,Y,Y,Y,Y)
OUTPUT(V2,Y,N,Y,Y,Y,Y)
OUTPUT(W1,Y,N,Y,Y,Y,Y)
OUTPUT(W2,Y,N,Y,Y,Y,Y)
OUTPUT(R1,Y,N,Y,Y,Y,Y)
OUTPUT(R2,Y,N,Y,Y,Y,Y)
************************************************************
Group 22. Monitor Print-Out
IXMON = 1 ;IYMON = 3 ;IZMON = 10
NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = -1
UWATCH = T ;USTEER = T
HIGHLO = F
************************************************************
Group 23.Field Print-Out & Plot Control
NPRINT = 100000 ;NUMCLS = 5
NYPRIN = 1 ;IYPRF = 1 ;IYPRL = 10000
NZPRIN = 1 ;IZPRF = 1 ;IZPRL = 10000
XZPR = F ;YZPR = F
IPLTF = 1 ;IPLTL = -1 ;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
No PATCHes yet used for this Group
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
STOP
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