```
TALK=T;RUN(1,1)
photon use
p

msg the grid.press return for velocity vectors
gr y m;mirr y;pause
msg velocity vectors. press return for pressure contours
vec y m sh;pause;cl
msg pressure contours on the mid-plane.
mirr y;gr ou y m;view y;up x; con  p1 y m fi;0.0002
pause;cl
msg velocity profile downstream.
view z;up y;gr ou z m;vec z m sh
enduse
DISPLAY

The flow is isothermal and the example duct is a cylindrical
channel curved curved through 180 deg. The point of this case
is to display the good behaviour of PHOENICS with fully 3D
flows.

Since the 3D phenomena take place downstream of the bend, a
length of 8 diameters is considered. The upstream length is
only 2 diameters since the slight influence of the curved duct
in the inlet region.

ENDDIS
DISPLAY
It is possible to redefine the number of cells in each direction.
The 2D geometry can be changed in the following aspects:

- the angle Angu of the curvature.
- the lengths of the upstream and downstream regions.

ext2=8 D
<-------------->
*  * * * * * * *
*
Rc <-*---|O
*
*  * <-- U=1.29 m/s
<-->
ext1=2 D

Rc stands for the inner radius to the centre of the duct:
Rc/D = 3.375
ENDDIS
DISPLAY

Data (default):
----
Diameter: D=0.0445 m
Curved duct curvature radius: Rc=3.375*D = 0.1501 m
Inlet velocity : U= 1.29 m/s
Fluid Nature : Water
Kinematic viscosity: Enul= 1.E-6  m2/s
Reynolds Number: Re= U*D/Enul= 57.4E3

Physical models:
----------------
Turbulence Model : K-Epsilon

ENDDIS
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************

TEXT(FLOW IN A 180 Deg CURVED DUCT           )

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

IRUNN = 1 ;LIBREF = 0
************************************************************
Group 2. Time dependence
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 5
XULAST =3.1416
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 10
YVLAST =0.02225
************************************************************
Group 5. Z-Direction Grid Spacing
PARAB = F
NZ = 25
ZWLAST =0.5
************************************************************
Group 6. Body-Fitted Coordinates
BFC = T ;NONORT = T
NCRT = -1
RSTGEO = F ;SAVGEO = F
UUP = F ;VUP = F ;WUP = F
NGEOM =CHAM
NAMXYZ =CHAM
ANGMIN =20.
DOMAIN(   1,   6,   1,  11,   1,  26)
* Set fixed sub-domain
FIXDOM(   1,   0,   0,   0,   0,   0,   0)
FIXDOM(   2,   0,   0,   0,   0,   0,   0)
FIXDOM(   3,   0,   0,   0,   0,   0,   0)
FIXDOM(   4,   0,   0,   0,   0,   0,   0)
FIXDOM(   5,   0,   0,   0,   0,   0,   0)
FIXDOM(   6,   0,   0,   0,   0,   0,   0)
FIXDOM(   7,   0,   0,   0,   0,   0,   0)
FIXDOM(   8,   0,   0,   0,   0,   0,   0)
FIXDOM(   9,   0,   0,   0,   0,   0,   0)
FIXDOM(  10,   0,   0,   0,   0,   0,   0)
LIJ = F ;LJK = T ;LIK = F
************************************************************
Group 7. Variables: STOREd,SOLVEd,NAMEd
ONEPHS = T
NAME(1)=P1 ;NAME(3)=U1
NAME(5)=V1 ;NAME(7)=W1
NAME(12)=KE ;NAME(13)=EP
NAME(42)=EPKE ;NAME(43)=YPLS
NAME(44)=EL1 ;NAME(45)=ENUT
NAME(46)=WCRT ;NAME(47)=VCRT
NAME(48)=UCRT ;NAME(49)=DEN1
NAME(50)=PRPS
* 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(V1,Y,Y,N,N,N,Y)
SOLUTN(W1,Y,Y,N,N,N,Y)
SOLUTN(KE,Y,Y,N,N,N,N)
SOLUTN(EP,Y,Y,N,N,N,N)
SOLUTN(EPKE,Y,N,N,N,N,Y)
SOLUTN(YPLS,Y,N,N,N,N,Y)
SOLUTN(EL1,Y,N,N,N,N,Y)
SOLUTN(ENUT,Y,N,N,N,N,Y)
SOLUTN(WCRT,Y,N,N,N,N,Y)
SOLUTN(VCRT,Y,N,N,N,N,Y)
SOLUTN(UCRT,Y,N,N,N,N,Y)
SOLUTN(DEN1,Y,N,N,N,N,Y)
SOLUTN(PRPS,Y,N,N,N,N,Y)
DEN1 = 49
VIST = 45
LEN1 = 44
PRPS = 50
************************************************************
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(W1,Y,Y,Y,Y,Y,Y)
TERMS(KE,N,Y,Y,Y,Y,N)
TERMS(EP,N,Y,Y,Y,Y,N)
DIFCUT =0.5 ;ZDIFAC =1.
GALA = F ;ADDDIF = F
NEWENT = 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 = FILE ;TMP1 =0.
EL1 = GRND4
TSURR =0. ;TEMP0 =0.
PRESS0 =0.
DVO1DT =0. ;DRH1DP =0.
EMISS =0. ;SCATT =0.
EL1A =0. ;EL1B =0.
EL1C =0.
ENUL = FILE ;ENUT = GRND3
ENUTA =0. ;ENUTB =0.
ENUTC =0.
IENUTA = 0
PRNDTL(U1)=1. ;PRNDTL(V1)=1.
PRNDTL(W1)=1. ;PRNDTL(KE)=1.
PRNDTL(EP)=1.
PRT(U1)=1. ;PRT(V1)=1.
PRT(W1)=1. ;PRT(KE)=1.
PRT(EP)=1.314
CP1 =4182. ;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(W1)=1.0E-10
FIINIT(KE)=6.656E-04 ;FIINIT(EP)=3.964E-03
FIINIT(EPKE)=1. ;FIINIT(YPLS)=1.0E-10
FIINIT(EL1)=1.0E-10 ;FIINIT(ENUT)=1.0E-10
FIINIT(WCRT)=1.0E-10 ;FIINIT(VCRT)=1.0E-10
FIINIT(UCRT)=1.0E-10 ;FIINIT(DEN1)=1.0E-10
FIINIT(PRPS)=67.
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(KESOURCE,PHASEM, 0, 0, 0, 0, 0, 0, 1, 1)
COVAL(KESOURCE,KE , GRND4 , GRND4 )
COVAL(KESOURCE,EP , GRND4 , GRND4 )

PATCH(BFCIN ,LOW , 1, 5, 1, 10, 1, 1, 1, 1)
COVAL(BFCIN ,P1 , FIXFLU , GRND1 )
COVAL(BFCIN ,U1 ,0. , GRND1 )
COVAL(BFCIN ,V1 ,0. , GRND1 )
COVAL(BFCIN ,W1 ,0. , GRND1 )
COVAL(BFCIN ,KE ,0. ,6.656E-04 )
COVAL(BFCIN ,EP ,0. ,3.964E-03 )
COVAL(BFCIN ,WCRT,0. ,1.29 )

PATCH(OUT ,HIGH , 1, 5, 1, 10, 25, 25, 1, 1)
COVAL(OUT ,P1 ,100. ,0. )
COVAL(OUT ,KE ,0. , SAME )
COVAL(OUT ,EP ,0. , SAME )

PATCH(WALL ,NWALL , 1, 5, 10, 10, 1, 25, 1, 1)
COVAL(WALL ,U1 , GRND2 ,0. )
COVAL(WALL ,W1 , GRND2 ,0. )
COVAL(WALL ,KE , GRND2 , GRND2 )
COVAL(WALL ,EP , GRND2 , GRND2 )
XCYCLE = F
EGWF = T
WALLCO = GRND2
BFCA =998.200012
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 1000 ;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)=2
LITER(V1)=2 ;LITER(W1)=2
LITER(KE)=20 ;LITER(EP)=20
ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
ENDIT(V1)=1.0E-03 ;ENDIT(W1)=1.0E-03
ENDIT(KE)=1.0E-03 ;ENDIT(EP)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(P1,LINRLX,0.7)
RELAX(U1,FALSDT,0.0115)
RELAX(V1,FALSDT,0.0115)
RELAX(W1,FALSDT,0.0115)
RELAX(KE,LINRLX,0.4)
RELAX(EP,LINRLX,0.4)
RELAX(EPKE,LINRLX,1.)
RELAX(YPLS,LINRLX,1.)
RELAX(EL1,LINRLX,1.)
RELAX(ENUT,LINRLX,1.)
RELAX(WCRT,LINRLX,1.)
RELAX(VCRT,LINRLX,1.)
RELAX(UCRT,LINRLX,1.)
RELAX(DEN1,LINRLX,1.)
RELAX(PRPS,LINRLX,1.)
KELIN = 3
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(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06
VARMAX(KE)=1.0E+10 ;VARMIN(KE)=1.0E-10
VARMAX(EP)=1.0E+10 ;VARMIN(EP)=1.0E-10
VARMAX(EPKE)=1.0E+10 ;VARMIN(EPKE)=-1.0E+10
VARMAX(YPLS)=1.0E+10 ;VARMIN(YPLS)=-1.0E+10
VARMAX(EL1)=1.0E+10 ;VARMIN(EL1)=-1.0E+10
VARMAX(ENUT)=1.0E+10 ;VARMIN(ENUT)=-1.0E+10
VARMAX(WCRT)=1.0E+10 ;VARMIN(WCRT)=-1.0E+10
VARMAX(VCRT)=1.0E+10 ;VARMIN(VCRT)=-1.0E+10
VARMAX(UCRT)=1.0E+10 ;VARMIN(UCRT)=-1.0E+10
VARMAX(DEN1)=1.0E+10 ;VARMIN(DEN1)=-1.0E+10
VARMAX(PRPS)=1.0E+10 ;VARMIN(PRPS)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
GENK = T
PARSOL = F
ISG62 = 1
SPEDAT(SET,MATERIAL,67,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(V1,Y,N,Y,Y,Y,Y)
OUTPUT(W1,Y,N,Y,Y,Y,Y)
OUTPUT(KE,Y,N,Y,Y,Y,Y)
OUTPUT(EP,Y,N,Y,Y,Y,Y)
OUTPUT(EPKE,Y,N,Y,N,N,N)
OUTPUT(YPLS,Y,N,Y,N,N,N)
OUTPUT(EL1,Y,N,Y,N,N,N)
OUTPUT(ENUT,Y,N,Y,N,N,N)
OUTPUT(WCRT,Y,N,Y,N,N,N)
OUTPUT(VCRT,Y,N,Y,N,N,N)
OUTPUT(UCRT,Y,N,Y,N,N,N)
OUTPUT(DEN1,Y,N,Y,N,N,N)
OUTPUT(PRPS,Y,N,Y,N,N,N)
************************************************************
Group 22. Monitor Print-Out
IXMON = 7 ;IYMON = 7 ;IZMON = 17
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
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
```