TALK=T;RUN(1,1)
DISPLAY
The case considered is that of solid particles falling through
stagnant liquid under gravity. A 1d unsteady simulation is
performed with the algebraic slip model (asm), in which particles
are released and allowed to fall under gravity. The particles
eventually attain a uniform terminal settling velocity, under
which the drag force balances the gravitational force. In the
present case, the task is to calculate this velocity for which
the theroretical value is 0.012m/s.
The calculation may be performed in the x-, y- or z-direction with
or without the liquid hydrostatic pressure included the solved-for
pressure P1.
ENDDIS
PHOTON USE
autoplot
file
phi 5
da 1 pt1; col3 1; level x .1469
key
0.62162E+03 0.17847E+04 a
0.17751E+04 0.17847E+04 l
0.17751E+04 0.17847E+04 x
text
1
particles fall 0.147m in 13.26s
0.14610E+04 0.14330E+04 CR
text
1
giving a settling velocity of 0.011m/s.
0.14610E+04 0.12962E+04 CR
key
0.11599E+04 0.17456E+04 a
0.15637E+04 0.14069E+04 l
0.15637E+04 0.14069E+04 x
text
1
PT1
0.29092E+03 0.25533E+04 C
DIST(m)
0.31337E+04 0.15633E+03 c
Theoretical terminal velocity = 0.012m/s
0.14610E+04 0.10878E+04 CR
redr
msg press to continue
msg press e to END
ENDUSE
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************
TEXT(ASM 1D SETTLING OF PARTICLES P112 )
************************************************************
************************************************************
IRUNN = 1 ;LIBREF = 14
************************************************************
Group 2. Time dependence
STEADY = F
* Set overall time and no. of steps
TFIRST =0. ;TLAST =13.264611
FSTEP = 1 ;LSTEP = 10
TFRAC(1)=0.1 ;TFRAC(2)=0.2
TFRAC(3)=0.3 ;TFRAC(4)=0.4
TFRAC(5)=0.5 ;TFRAC(6)=0.6
TFRAC(7)=0.7 ;TFRAC(8)=0.8
TFRAC(9)=0.9 ;TFRAC(10)=1.
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 40
XULAST =0.4
XFRAC(1)=0.025 ;XFRAC(2)=0.05
XFRAC(3)=0.075 ;XFRAC(4)=0.1
XFRAC(5)=0.125 ;XFRAC(6)=0.15
XFRAC(7)=0.175 ;XFRAC(8)=0.2
XFRAC(9)=0.225 ;XFRAC(10)=0.25
XFRAC(11)=0.275 ;XFRAC(12)=0.3
XFRAC(13)=0.325 ;XFRAC(14)=0.35
XFRAC(15)=0.375 ;XFRAC(16)=0.4
XFRAC(17)=0.425 ;XFRAC(18)=0.45
XFRAC(19)=0.475 ;XFRAC(20)=0.5
XFRAC(21)=0.525 ;XFRAC(22)=0.55
XFRAC(23)=0.575 ;XFRAC(24)=0.6
XFRAC(25)=0.625 ;XFRAC(26)=0.65
XFRAC(27)=0.675 ;XFRAC(28)=0.7
XFRAC(29)=0.725 ;XFRAC(30)=0.75
XFRAC(31)=0.775 ;XFRAC(32)=0.8
XFRAC(33)=0.825 ;XFRAC(34)=0.85
XFRAC(35)=0.875 ;XFRAC(36)=0.9
XFRAC(37)=0.925 ;XFRAC(38)=0.95
XFRAC(39)=0.975 ;XFRAC(40)=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 = T
NAME(1)=P1 ;NAME(3)=U1
NAME(16)=PT0 ;NAME(17)=PT1
NAME(147)=UTER ;NAME(148)=VISL
NAME(149)=DEN1 ;NAME(150)=VFOL
* 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,Y,N,N,Y)
SOLUTN(U1,Y,Y,N,N,N,Y)
SOLUTN(PT0,Y,Y,N,N,N,Y)
SOLUTN(PT1,Y,Y,N,N,N,Y)
SOLUTN(UTER,Y,N,N,N,N,Y)
SOLUTN(VISL,Y,N,N,N,N,Y)
SOLUTN(DEN1,Y,N,N,N,N,Y)
SOLUTN(VFOL,Y,Y,N,N,N,Y)
DEN1 = 149
VISL = 148
************************************************************
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(PT0,N,Y,Y,Y,Y,Y)
TERMS(PT1,N,Y,Y,Y,N,Y)
TERMS(VFOL,N,N,N,N,Y,Y)
DIFCUT =0.5 ;ZDIFAC =1.
GALA = T ;ADDDIF = F
NEWRH1 = T
NEWENL = T
ISOLX = -1 ;ISOLY = -1 ;ISOLZ = -1
************************************************************
Group 9. Properties used if PRPS is not
stored, and where PRPS = -1.0 if it is!
RHO1 = GRND ;TMP1 =0. ;EL1 =0.
TSURR =0. ;TEMP0 =0. ;PRESS0 =0.
DVO1DT =0. ;DRH1DP =0.
RHO1A =0. ;RHO1B =0. ;RHO1C =0.
EMISS =0. ;SCATT =0.
RADIA =0. ;RADIB =0.
ENUL = GRND ;ENUT =0.
ENULA =1.0E-06 ;ENULB =0. ;ENULC =0. ;ENULD =0.
ENULE =0. ;ENULF =0. ;ENULG =0.
IENULA = 0 ;IENULB = 0
CINT(PT0)=1. ;CINT(PT1)=1.0E-04
CINT(UTER)=1. ;CINT(VISL)=1.
CINT(DEN1)=1. ;CINT(VFOL)=1.
PHINT(PT0)=-2.022E+04 ;PHINT(PT1)=3300.
PHINT(UTER)=-2.022E+04 ;PHINT(VISL)=-2.022E+04
PHINT(DEN1)=-2.022E+04 ;PHINT(VFOL)=-2.022E+04
PRNDTL(U1)=1. ;PRNDTL(PT0)=1.0E-06
PRNDTL(PT1)=1.35E-06
PRT(U1)=1. ;PRT(PT0)=1.
PRT(PT1)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(P1)=1.0E-10 ;FIINIT(U1)=1.0E-10
FIINIT(PT0)=1. ;FIINIT(PT1)=0.
FIINIT(UTER)=1.0E-10 ;FIINIT(VISL)=1.0E-10
FIINIT(DEN1)=1.0E-10 ;FIINIT(VFOL)=1.0E-10
PATCH(PT_INIT ,INIVAL, 1, 1, 1, 1, 1, 1, 1, 1)
INIT(PT_INIT ,PT0 ,0. ,0.9 )
INIT(PT_INIT ,PT1 ,0. ,0.1 )
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(ASM_OUT ,CELL , 40, 40, 1, 1, 1, 1, 1, 10)
COVAL(ASM_OUT ,P1 ,1000. ,0. )
PATCH(BUOYANCY,PHASEM, 1, 40, 1, 1, 1, 1, 1, 10)
COVAL(BUOYANCY,U1 , FIXFLU , GRND1 )
XCYCLE = F
EGWF = T
WALLCO = GRND2
BUOYA =9.81 ; BUOYB =0. ; BUOYC =0.
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 100 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
SELREF = T
RESFAC =1.0E-08
************************************************************
Group 16. Terminate Iterations
LITER(P1)=20 ;LITER(U1)=10
LITER(PT0)=2 ;LITER(PT1)=5
LITER(VFOL)=20
ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
ENDIT(PT0)=1.0E-08 ;ENDIT(PT1)=1.0E-05
ENDIT(VFOL)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(P1,LINRLX,1.)
RELAX(U1,FALSDT,2.487114)
RELAX(PT0,LINRLX,0.3)
RELAX(PT1,LINRLX,0.3)
RELAX(UTER,LINRLX,1.)
RELAX(VISL,LINRLX,1.)
RELAX(DEN1,LINRLX,0.5)
RELAX(VFOL,FALSDT,1.0E+09)
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(PT0)=1.0E+10 ;VARMIN(PT0)=-1.0E+10
VARMAX(PT1)=1.0E+10 ;VARMIN(PT1)=-1.0E+10
VARMAX(UTER)=1.0E+10 ;VARMIN(UTER)=-1.0E+10
VARMAX(VISL)=1.0E+10 ;VARMIN(VISL)=-1.0E+10
VARMAX(DEN1)=1.0E+10 ;VARMIN(DEN1)=-1.0E+10
VARMAX(VFOL)=1.0E+10 ;VARMIN(VFOL)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
ASLP = T
PARSOL = F
ISG62 = 1
SPEDAT(SET,GXMONI,TRANSIENT,L,F)
SPEDAT(SET,GXMONI,PLOTALL,L,T)
************************************************************
Group 20. Preliminary Printout
DISTIL = T ;NULLPR = F
NDST = 0
DSTTOL =1.0E-02
EX(P1)=1973. ;EX(U1)=3.487E-12
EX(PT0)=0.9978 ;EX(PT1)=2.5E-03
EX(UTER)=1.0E-10 ;EX(VISL)=1.001E-06
EX(DEN1)=1032. ;EX(VFOL)=1.0E-10
************************************************************
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(PT0,Y,N,Y,Y,Y,Y)
OUTPUT(PT1,Y,N,Y,Y,Y,Y)
OUTPUT(UTER,Y,N,Y,N,N,N)
OUTPUT(VISL,Y,N,Y,N,N,N)
OUTPUT(DEN1,Y,N,Y,N,N,N)
OUTPUT(VFOL,Y,N,Y,Y,Y,Y)
************************************************************
Group 22. Monitor Print-Out
IXMON = 20 ;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
NTPRIN = 100000 ;ISTPRF = 1 ;ISTPRL = 100000
NXPRIN = 1 ;IXPRF = 1 ;IXPRL = 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
No PATCHes yet used for this Group
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
STOP