TALK=T;RUN(1,1)
  DISPLAY

  A plate is held centrally in a square box through the wall of
  which flows an inviscid fluid.

  The velocity potential at the walls accords with the formula:

      POT = aa * x   +   bb * y
  where aa = -1 and bb = -1
     (which can of course be changed by editing the Q1 file)

  The task is to compute the flow field within the box.

  In-Form is used in order to specify the boundary condition.

  The plate is represented by setting area porosity to zero.

  The Q1 uses SOURCE In-Form statement.

   The Q1 contains PHOTON USE commands
  ENDDIS
  PHOTON USE
  p
  phi


  msg         Potential flow past an inclined plate
  msg
  set ref vec 5
  msg   Velocity vectors:
  gr ou z 1;vec z 1 sh
  msg
  msg Press  to continue
  pause
  vec off;red
  msg        west to east velocity contours:
  con u1 z 1 fi;.01
  msg
  msg Press  to continue
  pause
  msg        south to north velocity contours:
  con v1 z 1 fi;.01
  msg
  msg Press  to continue
  pause
  con off;red
  msg        Streamlines and contours of velocity potential:
  con pot z 1 sh; int 20
  stre 2d z 1 sh; int 20
  msg Press e to END
  enduse
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(Pot. Flow; Inclined Plate               )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 0
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 40
 XULAST =1.
 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 = 40
 YVLAST =1.
 YFRAC(1)=0.025 ;YFRAC(2)=0.05
 YFRAC(3)=0.075 ;YFRAC(4)=0.1
 YFRAC(5)=0.125 ;YFRAC(6)=0.15
 YFRAC(7)=0.175 ;YFRAC(8)=0.2
 YFRAC(9)=0.225 ;YFRAC(10)=0.25
 YFRAC(11)=0.275 ;YFRAC(12)=0.3
 YFRAC(13)=0.325 ;YFRAC(14)=0.35
 YFRAC(15)=0.375 ;YFRAC(16)=0.4
 YFRAC(17)=0.425 ;YFRAC(18)=0.45
 YFRAC(19)=0.475 ;YFRAC(20)=0.5
 YFRAC(21)=0.525 ;YFRAC(22)=0.55
 YFRAC(23)=0.575 ;YFRAC(24)=0.6
 YFRAC(25)=0.625 ;YFRAC(26)=0.65
 YFRAC(27)=0.675 ;YFRAC(28)=0.7
 YFRAC(29)=0.725 ;YFRAC(30)=0.75
 YFRAC(31)=0.775 ;YFRAC(32)=0.8
 YFRAC(33)=0.825 ;YFRAC(34)=0.85
 YFRAC(35)=0.875 ;YFRAC(36)=0.9
 YFRAC(37)=0.925 ;YFRAC(38)=0.95
 YFRAC(39)=0.975 ;YFRAC(40)=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(3)=U1 ;NAME(5)=V1
 NAME(149)=EPOR ;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(U1,Y,N,N,N,N,Y)
 SOLUTN(V1,Y,N,N,N,N,Y)
 SOLUTN(EPOR,Y,N,N,N,N,Y)
 SOLUTN(POT,Y,Y,Y,N,N,N)
 EPOR = 149 ;HPOR = 0 ;NPOR = 0 ;VPOR = 0
 ************************************************************
  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.
 RADIA =0. ;RADIB =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(U1)=1.0E-10 ;FIINIT(V1)=1.0E-10
 FIINIT(EPOR)=1. ;FIINIT(POT)=1.0E-10
 
 PATCH(PLATE ,INIVAL, 20, 20, 11, 30, 1, 1, 1, 1)
 INIT(PLATE ,EPOR, FIXVAL ,0. )
 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(NORTH ,NORTH , 2, 39, 40, 40, 1, 1, 1, 1)
 COVAL(NORTH ,POT ,In-Form:source - see Grp 19)
 
 PATCH(SOUTH ,SOUTH , 2, 39, 1, 1, 1, 1, 1, 1)
 COVAL(SOUTH ,POT ,In-Form:source - see Grp 19)
 
 PATCH(EAST ,EAST , 40, 40, 1, 40, 1, 1, 1, 1)
 COVAL(EAST ,POT ,In-Form:source - see Grp 19)
 
 PATCH(WEST ,WEST , 1, 1, 1, 40, 1, 1, 1, 1)
 COVAL(WEST ,POT ,In-Form:source - see Grp 19)
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 2 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 SELREF = T
 RESFAC =1.0E-04
 ************************************************************
  Group 16. Terminate Iterations
 LITER(POT)=-1000
 ENDIT(POT)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(U1,LINRLX,1.)
 RELAX(V1,LINRLX,1.)
 RELAX(POT,LINRLX,1.)
 OVRRLX =0.
 EXPERT = F ;NNORSL = F
 ************************************************************
  Group 18. Limits
 VARMAX(U1)=1.0E+06 ;VARMIN(U1)=-1.0E+06
 VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
 VARMAX(EPOR)=1.0E+10 ;VARMIN(EPOR)=-1.0E+10
 VARMAX(POT)=1.0E+10 ;VARMIN(POT)=-1.0E+10
 ************************************************************
  Group 19. Data transmitted to GROUND
 POTVEL = T
 PARSOL = F
 ISG62 = 1
 SPEDAT(SET,SOURCE,POT!NORTH,C,=-1.*XG-1.*YG!FIXVAL)
 SPEDAT(SET,SOURCE,POT!SOUTH,C,=-1.*XG-1.*YG!FIXVAL)
 SPEDAT(SET,SOURCE,POT!EAST,C,=-1.*XG-1.*YG!FIXVAL)
 SPEDAT(SET,SOURCE,POT!WEST,C,=-1.*XG-1.*YG!FIXVAL)
 ************************************************************
  Group 20. Preliminary Printout
 DISTIL = T ;NULLPR = F
 NDST = 0
 DSTTOL =1.0E-02
 EX(U1)=0.8072 ;EX(V1)=1.005
 EX(EPOR)=0. ;EX(POT)=1.
 ************************************************************
  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(U1,Y,N,Y,N,N,N)
 OUTPUT(V1,Y,N,Y,N,N,N)
 OUTPUT(EPOR,N,N,N,N,N,N)
 OUTPUT(POT,Y,N,Y,N,N,N)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 1 ;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
 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
 
 PATCH(CONT ,CONTUR, 1, 40, 1, 40, 1, 1, 1, 1)
 PLOT(CONT ,POT ,0. ,20. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP