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

msg         Potential flow over a double-wedge airfoil
msg
set ref vec 10
msg   velocity vectors:
gr ou x 1;vec x 1 sh
msg
msg Press  to continue
pause
vec off;red
msg        Axial velocity contours:
con w1 x 1 fi;.01
msg
msg Press  to continue
pause
con off;red
msg        Contours of velocity potential:
con pot x 1 fi;.01
msg
msg Press e to END
enduse
DISPLAY
An inviscid fluid flows steadily past a double-wedge
airfoil. The problem is solved in the same manner as in case
115. The velocity components are computed by activation
(through POTVEL) of a sequence in GREX3.
The geometry of the problem is sketched below.

frictionless wall
____________________________________________________

----------->
---->                                        ---->

_-_
---->                  __|***|__             ---->
^                     __|*********|__
y|                  __|***************|__
| ________________|*********************|______________
frictionless wall
z---->
ENDDIS
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************

TEXT(Comp Flow Over Double-Wedge Airfoil     )

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

IRUNN = 1 ;LIBREF = 116
************************************************************
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 = 20
YVLAST =1.
YFRAC(1)=0.05 ;YFRAC(2)=0.1
YFRAC(3)=0.15 ;YFRAC(4)=0.2
YFRAC(5)=0.25 ;YFRAC(6)=0.3
YFRAC(7)=0.35 ;YFRAC(8)=0.4
YFRAC(9)=0.45 ;YFRAC(10)=0.5
YFRAC(11)=0.55 ;YFRAC(12)=0.6
YFRAC(13)=0.65 ;YFRAC(14)=0.7
YFRAC(15)=0.75 ;YFRAC(16)=0.8
YFRAC(17)=0.85 ;YFRAC(18)=0.9
YFRAC(19)=0.95 ;YFRAC(20)=1.
************************************************************
Group 5. Z-Direction Grid Spacing
PARAB = F
NZ = 40
ZWLAST =8.
ZFRAC(1)=0.025 ;ZFRAC(2)=0.05
ZFRAC(3)=0.075 ;ZFRAC(4)=0.1
ZFRAC(5)=0.125 ;ZFRAC(6)=0.15
ZFRAC(7)=0.175 ;ZFRAC(8)=0.2
ZFRAC(9)=0.225 ;ZFRAC(10)=0.25
ZFRAC(11)=0.275 ;ZFRAC(12)=0.3
ZFRAC(13)=0.325 ;ZFRAC(14)=0.35
ZFRAC(15)=0.375 ;ZFRAC(16)=0.4
ZFRAC(17)=0.425 ;ZFRAC(18)=0.45
ZFRAC(19)=0.475 ;ZFRAC(20)=0.5
ZFRAC(21)=0.525 ;ZFRAC(22)=0.55
ZFRAC(23)=0.575 ;ZFRAC(24)=0.6
ZFRAC(25)=0.625 ;ZFRAC(26)=0.65
ZFRAC(27)=0.675 ;ZFRAC(28)=0.7
ZFRAC(29)=0.725 ;ZFRAC(30)=0.75
ZFRAC(31)=0.775 ;ZFRAC(32)=0.8
ZFRAC(33)=0.825 ;ZFRAC(34)=0.85
ZFRAC(35)=0.875 ;ZFRAC(36)=0.9
ZFRAC(37)=0.925 ;ZFRAC(38)=0.95
ZFRAC(39)=0.975 ;ZFRAC(40)=1.
************************************************************
Group 6. Body-Fitted Coordinates
************************************************************
Group 7. Variables: STOREd,SOLVEd,NAMEd
ONEPHS = T
NAME(5)=V1 ;NAME(7)=W1
NAME(146)=PRPS ;NAME(147)=NPOR
NAME(149)=HPOR ;NAME(150)=POT
* Y in SOLUTN argument list denotes:
* 1-stored 2-solved 3-whole-field
* 4-point-by-point 5-explicit 6-harmonic averaging
SOLUTN(V1,Y,N,N,N,N,Y)
SOLUTN(W1,Y,N,N,N,N,Y)
SOLUTN(PRPS,Y,N,N,N,N,N)
SOLUTN(NPOR,Y,N,N,N,N,Y)
SOLUTN(HPOR,Y,N,N,N,N,Y)
SOLUTN(POT,Y,Y,N,N,N,Y)
EPOR = 0 ;HPOR = 149 ;NPOR = 147 ;VPOR = 0
PRPS = 146
************************************************************
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(POT,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-05 ;ENUT =0.
PRNDTL(POT)=1.
PRT(POT)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(V1)=1.0E-10 ;FIINIT(W1)=1.0E-10
FIINIT(PRPS)=-1. ;FIINIT(NPOR)=1.
FIINIT(HPOR)=1. ;FIINIT(POT)=1.0E-10

PATCH(HPOR1 ,INIVAL, 1, 1, 1, 1, 12, 28, 1, 1)
INIT(HPOR1 ,PRPS,0. ,199. )
INIT(HPOR1 ,NPOR,0. ,0. )
INIT(HPOR1 ,HPOR,0. ,0. )

PATCH(HPOR2 ,INIVAL, 1, 1, 2, 2, 14, 26, 1, 1)
INIT(HPOR2 ,PRPS,0. ,199. )
INIT(HPOR2 ,NPOR,0. ,0. )
INIT(HPOR2 ,HPOR,0. ,0. )

PATCH(HPOR3 ,INIVAL, 1, 1, 3, 3, 16, 24, 1, 1)
INIT(HPOR3 ,PRPS,0. ,199. )
INIT(HPOR3 ,NPOR,0. ,0. )
INIT(HPOR3 ,HPOR,0. ,0. )

PATCH(HPOR4 ,INIVAL, 1, 1, 4, 4, 18, 22, 1, 1)
INIT(HPOR4 ,PRPS,0. ,199. )
INIT(HPOR4 ,NPOR,0. ,0. )
INIT(HPOR4 ,HPOR,0. ,0. )

PATCH(HPOR5 ,INIVAL, 1, 1, 5, 5, 20, 20, 1, 1)
INIT(HPOR5 ,PRPS,0. ,199. )
INIT(HPOR5 ,NPOR,0. ,0. )
INIT(HPOR5 ,HPOR,0. ,0. )
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(UPSTRM ,LOW , 1, 1, 1, 20, 1, 1, 1, 1)
COVAL(UPSTRM ,POT , FIXVAL ,4. )

PATCH(DWNSTRM ,HIGH , 1, 1, 1, 20, 40, 40, 1, 1)
COVAL(DWNSTRM ,POT , FIXVAL ,-4. )
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
SELREF = T
RESFAC =1.0E-02
************************************************************
Group 16. Terminate Iterations
LITER(POT)=-100
ENDIT(POT)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(V1,LINRLX,1.)
RELAX(W1,LINRLX,1.)
RELAX(PRPS,LINRLX,1.)
RELAX(POT,FALSDT,1.0E+09)
OVRRLX =1.4
EXPERT = F ;NNORSL = F
************************************************************
Group 18. Limits
VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
VARMAX(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06
VARMAX(PRPS)=1.0E+10 ;VARMIN(PRPS)=-1.0E+10
VARMAX(NPOR)=1.0E+10 ;VARMIN(NPOR)=-1.0E+10
VARMAX(HPOR)=1.0E+10 ;VARMIN(HPOR)=-1.0E+10
VARMAX(POT)=1.0E+10 ;VARMIN(POT)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
POTCMP = T
POTVEL = T
PARSOL = F
ISG62 = 1
PORIA =0.010417 ;PORIB =2.5
SPEDAT(SET,MATERIAL,199,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(V1,Y,N,N,N,Y,N)
OUTPUT(W1,Y,N,N,N,Y,N)
OUTPUT(PRPS,Y,N,Y,N,N,N)
OUTPUT(NPOR,Y,N,Y,N,N,N)
OUTPUT(HPOR,Y,N,N,N,Y,N)
OUTPUT(POT,Y,Y,Y,Y,Y,N)
************************************************************
Group 22. Monitor Print-Out
IXMON = 1 ;IYMON = 10 ;IZMON = 20
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 = 10
NZPRIN = 1 ;IZPRF = 18 ;IZPRL = 22
XZPR = F ;YZPR = F
IPLTF = 2 ;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(CONT ,CONTUR, 1, 1, 1, 20, 1, 40, 1, 1)
PLOT(CONT ,V1 ,0. ,10. )
PLOT(CONT ,W1 ,0. ,10. )
PLOT(CONT ,POT ,0. ,40. )
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
STOP
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