TALK=T;RUN(1,1)
  PHOTON USE
  p
  parphi
  1 1 6


  up z
  vi -y
  gr ou y 1
  con u1 y 1 fi;0.001
  msg velocity contours
  msg vertical dimension is time, horizontal is distance
  pause;cls
  msg pressure contours
  con p1 y 1 fi;0.001
  ENDUSE
  DISPLAY


    The pressure-dependent-porosity method is used to compute the
    transient distributions of velocity and pressure in a one-
    dimensional channel flow.

    Initially the water velocity is 0,8 meters per second
    everywhere; but shutting the exit causes a wave to flow back
    to the inlet.

    Since inflow continues unchecked, a further wave travels  in the
    opposite direction; and so on.

    The behaviour can be displayed via PHOTON, because idispa has
    been set to 1, dictating that information is placed on the parp$
hi
    file after every second time step.
  ENDDIS
  DISPLAY

  This is similar to case 471; but the flow is interrupted
  at both ends, not just one
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(Waves After Shutting Inlet And Outlet   )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 470
 ************************************************************
  Group 2. Time dependence
 STEADY = F
    * Set overall time and no. of steps
 TFIRST =0. ;TLAST =500.
 FSTEP = 1 ;LSTEP = 100
 TFRAC(1)=1.0E-02 ;TFRAC(6)=0.06
 TFRAC(11)=0.11 ;TFRAC(16)=0.16
 TFRAC(21)=0.21 ;TFRAC(26)=0.26
 TFRAC(31)=0.31 ;TFRAC(36)=0.36
 TFRAC(41)=0.41 ;TFRAC(46)=0.46
 TFRAC(51)=0.51 ;TFRAC(56)=0.56
 TFRAC(61)=0.61 ;TFRAC(66)=0.66
 TFRAC(71)=0.71 ;TFRAC(76)=0.76
 TFRAC(81)=0.81 ;TFRAC(86)=0.86
 TFRAC(91)=0.91 ;TFRAC(96)=0.96
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 50
 XULAST =1500.
 XFRAC(1)=0.02 ;XFRAC(2)=0.04
 XFRAC(3)=0.06 ;XFRAC(4)=0.08
 XFRAC(5)=0.1 ;XFRAC(6)=0.12
 XFRAC(7)=0.14 ;XFRAC(8)=0.16
 XFRAC(9)=0.18 ;XFRAC(10)=0.2
 XFRAC(11)=0.22 ;XFRAC(12)=0.24
 XFRAC(13)=0.26 ;XFRAC(14)=0.28
 XFRAC(15)=0.3 ;XFRAC(16)=0.32
 XFRAC(17)=0.34 ;XFRAC(18)=0.36
 XFRAC(19)=0.38 ;XFRAC(20)=0.4
 XFRAC(21)=0.42 ;XFRAC(22)=0.44
 XFRAC(23)=0.46 ;XFRAC(24)=0.48
 XFRAC(25)=0.5 ;XFRAC(26)=0.52
 XFRAC(27)=0.54 ;XFRAC(28)=0.56
 XFRAC(29)=0.58 ;XFRAC(30)=0.6
 XFRAC(31)=0.62 ;XFRAC(32)=0.64
 XFRAC(33)=0.66 ;XFRAC(34)=0.68
 XFRAC(35)=0.7 ;XFRAC(36)=0.72
 XFRAC(37)=0.74 ;XFRAC(38)=0.76
 XFRAC(39)=0.78 ;XFRAC(40)=0.8
 XFRAC(41)=0.82 ;XFRAC(42)=0.84
 XFRAC(43)=0.86 ;XFRAC(44)=0.88
 XFRAC(45)=0.9 ;XFRAC(46)=0.92
 XFRAC(47)=0.94 ;XFRAC(48)=0.96
 XFRAC(49)=0.98 ;XFRAC(50)=1.
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 1
 YVLAST =500.
 YFRAC(1)=1.
 ************************************************************
  Group 5. Z-Direction Grid Spacing
 PARAB = F
 NZ = 1
 ZWLAST =10.
 ZFRAC(1)=1.
 ************************************************************
  Group 6. Body-Fitted Coordinates
 ************************************************************
  Group 7. Variables: STOREd,SOLVEd,NAMEd
 ONEPHS = T
 NAME(1)=P1 ;NAME(3)=U1
 NAME(149)=VPOR ;NAME(150)=EPOR
    * 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(VPOR,Y,N,N,N,N,Y)
 SOLUTN(EPOR,Y,N,N,N,N,Y)
 EPOR = 150 ;HPOR = 0 ;NPOR = 0 ;VPOR = 149
 ************************************************************
  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)
 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 =1000. ;TMP1 =0.
 EL1 =0.
 TSURR =0. ;TEMP0 =0.
 PRESS0 =0.
 DVO1DT =0. ;DRH1DP =1.019368E-05
 EMISS =0. ;SCATT =0.
 RADIA =0. ;RADIB =0.
 ENUL =1.0E-06 ;ENUT =0.
 PRNDTL(U1)=1.
 PRT(U1)=1.
 CP1 =1. ;CP2 =1.
 ************************************************************
  Group 10.Inter-Phase Transfer Processes
 ************************************************************
  Group 11.Initial field variables (PHIs)
 FIINIT(P1)=0. ;FIINIT(U1)=0.08
 FIINIT(VPOR)=1. ;FIINIT(EPOR)=1.
   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
   No PATCHes yet used for this Group
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 15 ;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
 ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(U1,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(VPOR)=1.0E+10 ;VARMIN(VPOR)=-1.0E+10
 VARMAX(EPOR)=1.0E+10 ;VARMIN(EPOR)=-1.0E+10
 ************************************************************
  Group 19. Data transmitted to GROUND
 PARSOL = F
 IPORIA = 1
 ISG62 = 1
 PORIA =1. ;PORIB =1.019368E-05
 SPEDAT(SET,GXMONI,TRANSIENT,L,F)
 ************************************************************
  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,N,N,N,Y)
 OUTPUT(U1,Y,N,N,N,N,Y)
 OUTPUT(VPOR,Y,N,N,N,N,N)
 OUTPUT(EPOR,Y,N,N,N,N,N)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 49 ;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
 NTPRIN = 5 ;ISTPRF = 1 ;ISTPRL = 100000
 NXPRIN = -1 ;IXPRF = 1 ;IXPRL = 10000
 IPLTF = 1 ;IPLTL = -1 ;NPLT = -1
 ISWPRF = 1 ;ISWPRL = 100000
 ITABL = 2 ;IPROF = 1
 ABSIZ =0.5 ;ORSIZ =0.4
 NTZPRF = 1 ;NCOLPF = 50
 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20
 
 PATCH(WAVE ,PROFIL, 1, 50, 1, 1, 1, 1, 1, 100)
 PLOT(WAVE ,P1 ,0. ,200. )
 PLOT(WAVE ,U1 ,0. ,0.088 )
 
 PATCH(HALFWAY ,PROFIL, 25, 25, 1, 1, 1, 1, 1, 100)
 PLOT(HALFWAY ,P1 ,0. ,200. )
 PLOT(HALFWAY ,U1 ,0. ,0.088 )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
 IDISPA = 2 ;IDISPB = 0 ;IDISPC = 0
STOP