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

msg         Staggered velocities vectors
set vec ref 0.3
gr ou z 1;vec z 1 sh
msg Press  to continue
pause
vec off;red
set vec comp UC1 VC1 -
msg        Co-located velocities vectors
vec z 1 sh
msg Press e to END
ENDUSE
DISPLAY
This run analyses  the flow in a cavity,  the top  wall of  which
moves  with a constant velocity.  The grid is  uniform  and  flow
Reynolds  number  equals 100.  The UC1 and  VC1 scalar  variables
have  zero-slip boundary  conditions  and PLANT  is  used  to set
pressure gradient sources. So, these variables have the  meanings
of  co-located cartesian velocities  which are transported in the
convection  field  formed by  staggered  components.  CCV  option
of PHOENICS  can be  directly  used  for  further  details  and
comparisons.  The  example  can also  be treated as the technique
for physically based interpolation of staggered velocities in the
grid nodes.
ENDDIS
PLANTBEGIN
** Pressure gradient sources
PATCH(DPDX1,CELL,2,NX-1,1,NY,1,1,1,1)
VAL=AEAST*(WEST(P1)-EAST(P1))/2.
COVAL(DPDX1,UC1,FIXFLU,GRND)
PATCH(DPDX2,CELL,NX,NX,1,NY,1,1,1,1)
VAL=AEAST*(WEST(P1)-P1)
COVAL(DPDX2,UC1,FIXFLU,GRND)
PATCH(DPDX3,CELL,1,1,1,NY,1,1,1,1)
VAL=AEAST*(P1-EAST(P1))
COVAL(DPDX3,UC1,FIXFLU,GRND)

PATCH(DPDY1,CELL,1,NX,2,NY-1,1,1,1,1)
VAL=ANORTH*(SOUTH(P1)-NORTH(P1))/2.
COVAL(DPDY1,VC1,FIXFLU,GRND)
PATCH(DPDY2,CELL,1,NX,NY,NY,1,1,1,1)
VAL=ANORTH*(SOUTH(P1)-P1)
COVAL(DPDY2,VC1,FIXFLU,GRND)
PATCH(DPDY3,CELL,1,NX,1,1,1,1,1,1)
VAL=ANORTH*(P1-NORTH(P1))
COVAL(DPDY3,VC1,FIXFLU,GRND)
PLANTEND
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************

TEXT( CO-LOCATED VELOCITY CALCULATION:145    )

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

IRUNN = 1 ;LIBREF = 145
************************************************************
Group 2. Time dependence
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 10
XULAST =0.1
XFRAC(1)=0.1 ;XFRAC(2)=0.2
XFRAC(3)=0.3 ;XFRAC(4)=0.4
XFRAC(5)=0.5 ;XFRAC(6)=0.6
XFRAC(7)=0.7 ;XFRAC(8)=0.8
XFRAC(9)=0.9 ;XFRAC(10)=1.
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 10
YVLAST =0.1
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 = 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(5)=V1 ;NAME(149)=VC1
NAME(150)=UC1
* 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(V1,Y,Y,N,N,N,Y)
SOLUTN(VC1,Y,Y,N,N,N,Y)
SOLUTN(UC1,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(V1,Y,Y,Y,Y,Y,Y)
TERMS(VC1,N,Y,Y,Y,N,Y)
TERMS(UC1,N,Y,Y,Y,Y,Y)
DIFCUT =0.5 ;ZDIFAC =1.
GALA = F ;ADDDIF = 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.
ENUL =1.0E-03 ;ENUT =0.
PRNDTL(U1)=1. ;PRNDTL(V1)=1.
PRNDTL(VC1)=1. ;PRNDTL(UC1)=1.
PRT(U1)=1. ;PRT(V1)=1.
PRT(VC1)=1. ;PRT(UC1)=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(V1)=1.0E-10 ;FIINIT(VC1)=1.0E-10
FIINIT(UC1)=1.0E-10
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(SOUTH ,SWALL , 1, 10, 1, 1, 1, 1, 1, 1)
COVAL(SOUTH ,U1 ,1. ,0. )
COVAL(SOUTH ,UC1 ,1. ,0. )

PATCH(MOVING ,NWALL , 1, 10, 10, 10, 1, 1, 1, 1)
COVAL(MOVING ,U1 ,1. ,1. )
COVAL(MOVING ,UC1 ,1. ,1. )

PATCH(WEST ,WWALL , 1, 1, 1, 10, 1, 1, 1, 1)
COVAL(WEST ,V1 ,1. ,0. )
COVAL(WEST ,VC1 ,1. ,0. )

PATCH(EAST ,EWALL , 10, 10, 1, 10, 1, 1, 1, 1)
COVAL(EAST ,V1 ,1. ,0. )
COVAL(EAST ,VC1 ,1. ,0. )

PATCH(RELIEF ,CELL , 5, 5, 5, 5, 1, 1, 1, 1)
COVAL(RELIEF ,P1 ,1. ,0. )

PATCH(DPDX1 ,CELL , 2, 9, 1, 10, 1, 1, 1, 1)
COVAL(DPDX1 ,UC1 , FIXFLU , GRND )

PATCH(DPDX2 ,CELL , 10, 10, 1, 10, 1, 1, 1, 1)
COVAL(DPDX2 ,UC1 , FIXFLU , GRND )

PATCH(DPDX3 ,CELL , 1, 1, 1, 10, 1, 1, 1, 1)
COVAL(DPDX3 ,UC1 , FIXFLU , GRND )

PATCH(DPDY1 ,CELL , 1, 10, 2, 9, 1, 1, 1, 1)
COVAL(DPDY1 ,VC1 , FIXFLU , GRND )

PATCH(DPDY2 ,CELL , 1, 10, 10, 10, 1, 1, 1, 1)
COVAL(DPDY2 ,VC1 , FIXFLU , GRND )

PATCH(DPDY3 ,CELL , 1, 10, 1, 1, 1, 1, 1, 1)
COVAL(DPDY3 ,VC1 , FIXFLU , GRND )
XCYCLE = F
EGWF = T
WALLCO = GRND2
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 50 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
SELREF = T
RESFAC =1.0E-04
************************************************************
Group 16. Terminate Iterations
LITER(P1)=20 ;LITER(U1)=10
LITER(V1)=10 ;LITER(VC1)=20
LITER(UC1)=20
ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
ENDIT(V1)=1.0E-03 ;ENDIT(VC1)=1.0E-03
ENDIT(UC1)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(P1,LINRLX,1.)
RELAX(U1,FALSDT,1.)
RELAX(V1,FALSDT,1.)
RELAX(VC1,FALSDT,1.)
RELAX(UC1,FALSDT,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(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
VARMAX(VC1)=1.0E+10 ;VARMIN(VC1)=-1.0E+10
VARMAX(UC1)=1.0E+10 ;VARMIN(UC1)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
NAMSAT =MOSG
PARSOL = F
ISG62 = 1
************************************************************
Group 20. Preliminary Printout
DISTIL = T ;NULLPR = F
NDST = 0
DSTTOL =1.0E-02
EX(P1)=0.02713 ;EX(U1)=0.1279
EX(V1)=0.1062 ;EX(VC1)=0.09647
EX(UC1)=0.1176
************************************************************
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(V1,Y,N,Y,Y,Y,Y)
OUTPUT(VC1,Y,N,Y,Y,Y,Y)
OUTPUT(UC1,Y,N,Y,Y,Y,Y)
************************************************************
Group 22. Monitor Print-Out
IXMON = 5 ;IYMON = 9 ;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 = -1 ;IXPRF = 1 ;IXPRL = 10000
NYPRIN = -1 ;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
No PATCHes yet used for this Group
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
STOP
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