TALK=T;RUN(1,1)
PHOTON USE
p;parphi
1 5 1
gr x 1
msg The grid. Z signifies time. Press RETURN for gas vol. fraction
pause;gr off;red;gr ou x 1
msg the volume fraction of gas; press RETURN for pressure
con gas x 1 fi;0.01;pause;con off;red
msg the pressure; press RETURN for gas velocity
con p1 x 1 fi;0.01;pause;con off;red
msg the gas velocity; press RETURN for liquid velocity
con av1 x 1 y 1 19 fi;0.01;pause;con off;red
msg the liquid velocity
con bv2 x 1 y 1 19 fi;0.01
enduse
DISPLAY
A vertical tube has a closed upper end and two nearby but
separate apertures in the base. The tube is initially filled
with water. Air is injected through one of the lower apertures,
with the result that water is forced out through the other.
The duration of the calculation is chosen so that all the water
should just be expelled.
Bubbles of air rise through the falling stream of water within
the tube. The task is to calculate the variation with time of
the profiles of pressure and other variables within the tube.
PHOTON USE commands are supplied to enable the calculated
results to be understood.
Experiments of the above kind have been reported by S.Lo, in
an Imperial College, London University PhD thesis dated 1985.
ENDDIS
DISPLAY
Case 894 is similar to case 895; but the air supply is at the top
of the pipe rather than at the bottom.
Interestingly, convergence proves harder to obtain for this case,
in which the air and water travel in the same direction, than in
case 895, in which the flow directions were opposed. So heavier
under-relaxation, and a larger number of sweeps, are employed.
ENDDIS
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************
TEXT(WATER DISPLACED BY AIR FROM ABOVE :W894)
************************************************************
************************************************************
IRUNN = 1 ;LIBREF = 895
************************************************************
Group 2. Time dependence
STEADY = F
* Set overall time and no. of steps
TFIRST =0. ;TLAST =10.
FSTEP = 1 ;LSTEP = 400
TFRAC(1)=2.5E-03 ;TFRAC(41)=0.1025
TFRAC(81)=0.2025 ;TFRAC(121)=0.3025
TFRAC(161)=0.4025 ;TFRAC(201)=0.5025
TFRAC(241)=0.6025 ;TFRAC(281)=0.7025
TFRAC(321)=0.8025 ;TFRAC(361)=0.9025
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 1
XULAST =1.
XFRAC(1)=1.
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 20
YVLAST =1.
YFRAC(1)=0.05 ;YFRAC(3)=0.15
YFRAC(5)=0.25 ;YFRAC(7)=0.35
YFRAC(9)=0.45 ;YFRAC(11)=0.55
YFRAC(13)=0.65 ;YFRAC(15)=0.75
YFRAC(17)=0.85 ;YFRAC(19)=0.95
************************************************************
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(5)=AV1
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(AV1,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(AV1,Y,Y,N,Y,Y,Y)
TERMS(BV2,Y,Y,N,Y,N,Y)
TERMS(GAS,Y,Y,N,Y,Y,Y)
TERMS(LIQ,Y,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(AV1)=-2.022E+04 ;PHINT(BV2)=-2.022E+04
PHINT(GAS)=-2.022E+04 ;PHINT(LIQ)=-2.022E+04
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
CFIPS =1.0E+04
RLOLIM =0. ;CMDOT =0.
CINT(P1)=1. ;CINT(AV1)=1.
CINT(BV2)=1. ;CINT(GAS)=1.
CINT(LIQ)=1.
PHINT(P1)=-2.022E+04 ;PHINT(AV1)=-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(AV1)=1.0E-10
FIINIT(BV2)=1.0E-10 ;FIINIT(GAS)=1.0E-03
FIINIT(LIQ)=0.999
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(AIRIN ,NORTH , 1, 1, 20, 20, 1, 1, 1, 400)
COVAL(AIRIN ,GAS , FIXFLU ,0.1 )
PATCH(OUTLET ,SOUTH , 1, 1, 1, 1, 1, 1, 1, 400)
COVAL(OUTLET ,AV1 ,0. ,0. )
COVAL(OUTLET ,BV2 ,0. ,0. )
COVAL(OUTLET ,GAS ,1. ,0. )
COVAL(OUTLET ,LIQ ,1000. ,0. )
PATCH(GRAVTY ,PHASEM, 1, 1, 1, 20, 1, 1, 1, 400)
COVAL(GRAVTY ,AV1 , FIXFLU ,-9.81 )
COVAL(GRAVTY ,BV2 , FIXFLU ,-9.81 )
XCYCLE = F
EGWF = T
WALLCO = GRND2
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 100 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
ISWR1 = 1 ;ISWR2 = 10000
SELREF = T
RESFAC =1.0E-06
************************************************************
Group 16. Terminate Iterations
LITER(P1)=20 ;LITER(AV1)=10
LITER(BV2)=10 ;LITER(GAS)=1
LITER(LIQ)=1
ENDIT(P1)=1.0E-03 ;ENDIT(AV1)=1.0E-03
ENDIT(BV2)=1.0E-03 ;ENDIT(GAS)=1.0E-03
ENDIT(LIQ)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(P1,LINRLX,1.)
RELAX(AV1,FALSDT,1.)
RELAX(BV2,FALSDT,1.)
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(AV1)=1.0E+06 ;VARMIN(AV1)=-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
SPEDAT(SET,GXMONI,TRANSIENT,L,F)
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(AV1,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 = 1 ;IYMON = 19 ;IZMON = 1
NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = 99
UWATCH = T ;USTEER = T
HIGHLO = F
************************************************************
Group 23.Field Print-Out & Plot Control
NPRINT = 10 ;NUMCLS = 5
NTPRIN = 40 ;ISTPRF = 1 ;ISTPRL = 100000
NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000
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
PATCH(LONGPLOT,PROFIL, 1, 1, 1, 20, 1, 1, 1, 400)
PLOT(LONGPLOT,LIQ ,0. ,0. )
PATCH(TIMEPLOT,PROFIL, 1, 1, 15, 15, 1, 1, 1, 400)
PLOT(TIMEPLOT,AV1 ,-1. ,-1. )
PLOT(TIMEPLOT,BV2 ,-1. ,-1. )
PLOT(TIMEPLOT,GAS ,0. ,0. )
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
IDISPA = 20 ;IDISPB = 0 ;IDISPC = 0
STOP