TALK=T;RUN(1,1)
  DISPLAY
  Numerical Schemes validation example:
  2-d x-y, Cartesian, steady, elliptic simulation
  This problem concerns the pure convection of a step profile of
  a scalar by a unidirectional and uniform flow field, which forms
  an angle 45 degrees with the horizontal axis. Since physical
  diffusion is absent, no mixing layer should form and the scalar
  discontinuity should persist in the streamwise direction. The
  example compares the solution for 6 different linear schemes and
  9 non-linear schemes for the discretisation of convection.

              --> / / / / /                     y  ^
   inflow of  --> / / / / / flow at 45 deg         |
    'fluid 1' --> / / / / /                        +----->
              --> / / / / /                              x
                  ^  ^  ^  ^
                  |  |  |  |  inflow of
                                'fluid 2'
  ENDDIS
  PHOTON USE
   P;;;

  msg the grid and the velocity vectors
  vec z 1;gr z 1;pause;gr off;vec off;red
  cl;con USOL z 1 fi;.1
  msg usol: Upwind Differencing Scheme, the PHOENICS default

  pause; cl
  msg poorly performing schemes (omitted for case n122)
  pause;cl;con qSOL z 1 fi;.1
  msg qsol: QUICK Scheme

  pause;cl;con vSOL z 1 fi;.1
  msg vsol: Van Aldbda Scheme

  pause; cl; con 3SOL z 1 fi;.1
  msg 3sol: Cubic Upwind Scheme

  pause;cl;con oSOL z 1 fi;.1
  msg osol: Ospre Scheme

  pause ;cl;con fSOL z 1 fi;.1
  msg fsol: Fromm Scheme

  pause;cl;con lSOL z 1 fi;.1
  msg lsol: Linear upwind Scheme

  pause;  cl;con CSOL z 1 fi;.1
  msg csol: Cds Scheme
  pause; cl
  msg better-performing schemes

  pause ;  cl;con SSOL z 1 fi;.1
  msg ssol: Smart Scheme
  pause; cl;con bSOL z 1 fi;.1
  msg bsol: Superbee Scheme
  pause;cl;con hSOL z 1 fi;.1
  msg hsol: Hquick Scheme
  pause;cl;con iSOL z 1 fi;.1
  msg isol: UMIST Scheme
  pause;cl;con kSOL z 1 fi;.1
  msg ksol: Koren Scheme
  pause;cl;con mSOL z 1 fi;.1
  msg msol: Minmod Scheme
  pause;cl;con nSOL z 1 fi;.1
  msg nsol: Van Leer 1 Scheme
  pause;cl;con zSOL z 1 fi;.1
  msg zsol: Van Leer 2 Scheme
  ENDUSE
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(YX DIAGONAL SCALAR CONVECTION  :N101    )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 101
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 20
 XULAST =1.
 XFRAC(1)=0.05 ;XFRAC(2)=0.1
 XFRAC(3)=0.15 ;XFRAC(4)=0.2
 XFRAC(5)=0.25 ;XFRAC(6)=0.3
 XFRAC(7)=0.35 ;XFRAC(8)=0.4
 XFRAC(9)=0.45 ;XFRAC(10)=0.5
 XFRAC(11)=0.55 ;XFRAC(12)=0.6
 XFRAC(13)=0.65 ;XFRAC(14)=0.7
 XFRAC(15)=0.75 ;XFRAC(16)=0.8
 XFRAC(17)=0.85 ;XFRAC(18)=0.9
 XFRAC(19)=0.95 ;XFRAC(20)=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 = 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(135)=ZSOL
 NAME(136)=VSOL ;NAME(137)=USOL
 NAME(138)=SSOL ;NAME(139)=QSOL
 NAME(140)=OSOL ;NAME(141)=NSOL
 NAME(142)=MSOL ;NAME(143)=LSOL
 NAME(144)=KSOL ;NAME(145)=ISOL
 NAME(146)=HSOL ;NAME(147)=FSOL
 NAME(148)=CSOL ;NAME(149)=BSOL
 NAME(150)=3SOL
    * 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,N,N,N,N,Y)
 SOLUTN(U1,Y,N,N,N,N,Y)
 SOLUTN(V1,Y,N,N,N,N,Y)
 SOLUTN(ZSOL,Y,Y,N,N,N,Y)
 SOLUTN(VSOL,Y,Y,N,N,N,Y)
 SOLUTN(USOL,Y,Y,N,N,N,Y)
 SOLUTN(SSOL,Y,Y,N,N,N,Y)
 SOLUTN(QSOL,Y,Y,N,N,N,Y)
 SOLUTN(OSOL,Y,Y,N,N,N,Y)
 SOLUTN(NSOL,Y,Y,N,N,N,Y)
 SOLUTN(MSOL,Y,Y,N,N,N,Y)
 SOLUTN(LSOL,Y,Y,N,N,N,Y)
 SOLUTN(KSOL,Y,Y,N,N,N,Y)
 SOLUTN(ISOL,Y,Y,N,N,N,Y)
 SOLUTN(HSOL,Y,Y,N,N,N,Y)
 SOLUTN(FSOL,Y,Y,N,N,N,Y)
 SOLUTN(CSOL,Y,Y,N,N,N,Y)
 SOLUTN(BSOL,Y,Y,N,N,N,Y)
 SOLUTN(3SOL,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(ZSOL,N,Y,N,Y,N,Y)
 TERMS(VSOL,N,Y,N,Y,Y,Y)
 TERMS(USOL,N,Y,N,Y,N,Y)
 TERMS(SSOL,N,Y,N,Y,Y,Y)
 TERMS(QSOL,N,Y,N,Y,N,Y)
 TERMS(OSOL,N,Y,N,Y,Y,Y)
 TERMS(NSOL,N,Y,N,Y,N,Y)
 TERMS(MSOL,N,Y,N,Y,Y,Y)
 TERMS(LSOL,N,Y,N,Y,N,Y)
 TERMS(KSOL,N,Y,N,Y,Y,Y)
 TERMS(ISOL,N,Y,N,Y,N,Y)
 TERMS(HSOL,N,Y,N,Y,Y,Y)
 TERMS(FSOL,N,Y,N,Y,N,Y)
 TERMS(CSOL,N,Y,N,Y,Y,Y)
 TERMS(BSOL,N,Y,N,Y,N,Y)
 TERMS(3SOL,N,Y,N,Y,Y,Y)
 DIFCUT =0. ;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.
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(P1)=1.0E-10 ;FIINIT(U1)=2.
 FIINIT(V1)=1. ;FIINIT(ZSOL)=1.0E-10
 FIINIT(VSOL)=1.0E-10 ;FIINIT(USOL)=1.0E-10
 FIINIT(SSOL)=1.0E-10 ;FIINIT(QSOL)=1.0E-10
 FIINIT(OSOL)=1.0E-10 ;FIINIT(NSOL)=1.0E-10
 FIINIT(MSOL)=1.0E-10 ;FIINIT(LSOL)=1.0E-10
 FIINIT(KSOL)=1.0E-10 ;FIINIT(ISOL)=1.0E-10
 FIINIT(HSOL)=1.0E-10 ;FIINIT(FSOL)=1.0E-10
 FIINIT(CSOL)=1.0E-10 ;FIINIT(BSOL)=1.0E-10
 FIINIT(3SOL)=1.0E-10
   No PATCHes yet used for this Group
 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(HOCS ,CELL , 0, 0, 0, 0, 0, 0, 1, 1)
 COVAL(HOCS ,ZSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,VSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,SSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,QSOL, FIXFLU , GRND1 )
 COVAL(HOCS ,OSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,NSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,MSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,LSOL, FIXFLU , GRND1 )
 COVAL(HOCS ,KSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,ISOL, FIXFLU , GRND2 )
 COVAL(HOCS ,HSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,FSOL, FIXFLU , GRND1 )
 COVAL(HOCS ,CSOL, FIXFLU , GRND1 )
 COVAL(HOCS ,BSOL, FIXFLU , GRND2 )
 COVAL(HOCS ,3SOL, FIXFLU , GRND1 )
 
 PATCH(INL1 ,WEST , 1, 1, 1, 20, 1, 1, 1, 1)
 COVAL(INL1 ,ZSOL,1. ,1. )
 COVAL(INL1 ,VSOL,1. ,1. )
 COVAL(INL1 ,USOL,1. ,1. )
 COVAL(INL1 ,SSOL,1. ,1. )
 COVAL(INL1 ,QSOL,1. ,1. )
 COVAL(INL1 ,OSOL,1. ,1. )
 COVAL(INL1 ,NSOL,1. ,1. )
 COVAL(INL1 ,MSOL,1. ,1. )
 COVAL(INL1 ,LSOL,1. ,1. )
 COVAL(INL1 ,KSOL,1. ,1. )
 COVAL(INL1 ,ISOL,1. ,1. )
 COVAL(INL1 ,HSOL,1. ,1. )
 COVAL(INL1 ,FSOL,1. ,1. )
 COVAL(INL1 ,CSOL,1. ,1. )
 COVAL(INL1 ,BSOL,1. ,1. )
 COVAL(INL1 ,3SOL,1. ,1. )
 
 PATCH(INL2 ,SOUTH , 1, 20, 1, 1, 1, 1, 1, 1)
 COVAL(INL2 ,ZSOL,1. ,0. )
 COVAL(INL2 ,VSOL,1. ,0. )
 COVAL(INL2 ,USOL,1. ,0. )
 COVAL(INL2 ,SSOL,1. ,0. )
 COVAL(INL2 ,QSOL,1. ,0. )
 COVAL(INL2 ,OSOL,1. ,0. )
 COVAL(INL2 ,NSOL,1. ,0. )
 COVAL(INL2 ,MSOL,1. ,0. )
 COVAL(INL2 ,LSOL,1. ,0. )
 COVAL(INL2 ,KSOL,1. ,0. )
 COVAL(INL2 ,ISOL,1. ,0. )
 COVAL(INL2 ,HSOL,1. ,0. )
 COVAL(INL2 ,FSOL,1. ,0. )
 COVAL(INL2 ,CSOL,1. ,0. )
 COVAL(INL2 ,BSOL,1. ,0. )
 COVAL(INL2 ,3SOL,1. ,0. )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  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-04
 ************************************************************
  Group 16. Terminate Iterations
 LITER(ZSOL)=20 ;LITER(VSOL)=20
 LITER(USOL)=20 ;LITER(SSOL)=20
 LITER(QSOL)=20 ;LITER(OSOL)=20
 LITER(NSOL)=20 ;LITER(MSOL)=20
 LITER(LSOL)=20 ;LITER(KSOL)=20
 LITER(ISOL)=20 ;LITER(HSOL)=20
 LITER(FSOL)=20 ;LITER(CSOL)=20
 LITER(BSOL)=20 ;LITER(3SOL)=20
 ENDIT(ZSOL)=1.0E-03 ;ENDIT(VSOL)=1.0E-03
 ENDIT(USOL)=1.0E-03 ;ENDIT(SSOL)=1.0E-03
 ENDIT(QSOL)=1.0E-03 ;ENDIT(OSOL)=1.0E-03
 ENDIT(NSOL)=1.0E-03 ;ENDIT(MSOL)=1.0E-03
 ENDIT(LSOL)=1.0E-03 ;ENDIT(KSOL)=1.0E-03
 ENDIT(ISOL)=1.0E-03 ;ENDIT(HSOL)=1.0E-03
 ENDIT(FSOL)=1.0E-03 ;ENDIT(CSOL)=1.0E-03
 ENDIT(BSOL)=1.0E-03 ;ENDIT(3SOL)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(U1,LINRLX,1.)
 RELAX(V1,LINRLX,1.)
 RELAX(ZSOL,FALSDT,1.0E+09)
 RELAX(VSOL,FALSDT,1.0E+09)
 RELAX(USOL,FALSDT,1.0E+09)
 RELAX(SSOL,FALSDT,0.1)
 RELAX(QSOL,FALSDT,1.0E+09)
 RELAX(OSOL,FALSDT,1.0E+09)
 RELAX(NSOL,FALSDT,1.0E+09)
 RELAX(MSOL,FALSDT,1.0E+09)
 RELAX(LSOL,FALSDT,1.0E+09)
 RELAX(KSOL,FALSDT,0.1)
 RELAX(ISOL,FALSDT,1.0E+09)
 RELAX(HSOL,FALSDT,1.0E+09)
 RELAX(FSOL,FALSDT,1.0E+09)
 RELAX(CSOL,FALSDT,1.0E+09)
 RELAX(BSOL,FALSDT,1.0E+09)
 RELAX(3SOL,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(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
 VARMAX(ZSOL)=1.0E+10 ;VARMIN(ZSOL)=-1.0E+10
 VARMAX(VSOL)=1.0E+10 ;VARMIN(VSOL)=-1.0E+10
 VARMAX(USOL)=1.0E+10 ;VARMIN(USOL)=-1.0E+10
 VARMAX(SSOL)=1.0E+10 ;VARMIN(SSOL)=-1.0E+10
 VARMAX(QSOL)=1.0E+10 ;VARMIN(QSOL)=-1.0E+10
 VARMAX(OSOL)=1.0E+10 ;VARMIN(OSOL)=-1.0E+10
 VARMAX(NSOL)=1.0E+10 ;VARMIN(NSOL)=-1.0E+10
 VARMAX(MSOL)=1.0E+10 ;VARMIN(MSOL)=-1.0E+10
 VARMAX(LSOL)=1.0E+10 ;VARMIN(LSOL)=-1.0E+10
 VARMAX(KSOL)=1.0E+10 ;VARMIN(KSOL)=-1.0E+10
 VARMAX(ISOL)=1.0E+10 ;VARMIN(ISOL)=-1.0E+10
 VARMAX(HSOL)=1.0E+10 ;VARMIN(HSOL)=-1.0E+10
 VARMAX(FSOL)=1.0E+10 ;VARMIN(FSOL)=-1.0E+10
 VARMAX(CSOL)=1.0E+10 ;VARMIN(CSOL)=-1.0E+10
 VARMAX(BSOL)=1.0E+10 ;VARMIN(BSOL)=-1.0E+10
 VARMAX(3SOL)=1.0E+10 ;VARMIN(3SOL)=-1.0E+10
 ************************************************************
  Group 19. Data transmitted to GROUND
 PARSOL = F
 ISG62 = 1
 SPEDAT(SET,SCHEME,INLCS139,I,4)
 SPEDAT(SET,SCHEME,INLCS148,I,5)
 SPEDAT(SET,SCHEME,INLCS143,I,1)
 SPEDAT(SET,SCHEME,INLCS150,I,3)
 SPEDAT(SET,SCHEME,INLCS147,I,2)
 SPEDAT(SET,SCHEME,INLCS138,I,6)
 SPEDAT(SET,SCHEME,INLCS144,I,7)
 SPEDAT(SET,SCHEME,INLCS142,I,13)
 SPEDAT(SET,SCHEME,INLCS136,I,12)
 SPEDAT(SET,SCHEME,INLCS149,I,14)
 SPEDAT(SET,SCHEME,INLCS146,I,9)
 SPEDAT(SET,SCHEME,INLCS141,I,8)
 SPEDAT(SET,SCHEME,INLCS135,I,11)
 SPEDAT(SET,SCHEME,INLCS140,I,10)
 SPEDAT(SET,SCHEME,INLCS145,I,15)
 SPEDAT(SET,LONGNAME,USOL,C,Upwind)
 SPEDAT(SET,LONGNAME,CSOL,C,Cds)
 SPEDAT(SET,LONGNAME,QSOL,C,Quick)
 SPEDAT(SET,LONGNAME,LSOL,C,Linear_upwind)
 SPEDAT(SET,LONGNAME,3SOL,C,Cubic_upwind)
 SPEDAT(SET,LONGNAME,FSOL,C,Fromm's_scheme)
 SPEDAT(SET,LONGNAME,SSOL,C,Smart)
 SPEDAT(SET,LONGNAME,KSOL,C,Koren)
 SPEDAT(SET,LONGNAME,MSOL,C,Minmod)
 SPEDAT(SET,LONGNAME,VSOL,C,Van_Aldbda)
 SPEDAT(SET,LONGNAME,BSOL,C,Superbee)
 SPEDAT(SET,LONGNAME,HSOL,C,Hquick)
 SPEDAT(SET,LONGNAME,NSOL,C,Van_Leer_1_(Noll))
 SPEDAT(SET,LONGNAME,ZSOL,C,Van_Leer_2_(Zhu))
 SPEDAT(SET,LONGNAME,OSOL,C,Ospre)
 SPEDAT(SET,LONGNAME,ISOL,C,UMIST)
 ************************************************************
  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,N,N,N)
 OUTPUT(U1,N,N,N,N,N,N)
 OUTPUT(V1,N,N,N,N,N,N)
 OUTPUT(ZSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(VSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(USOL,Y,N,Y,Y,Y,Y)
 OUTPUT(SSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(QSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(OSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(NSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(MSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(LSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(KSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(ISOL,Y,N,Y,Y,Y,Y)
 OUTPUT(HSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(FSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(CSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(BSOL,Y,N,Y,Y,Y,Y)
 OUTPUT(3SOL,Y,N,Y,Y,Y,Y)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 10 ;IYMON = 10 ;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 = 10
 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