TALK=T;RUN(1,1)
  DISPLAY
    HEAT-EXCHANGER SIMULATIONS BY MEANS OF PHOENICS
    These examples make extensive use of the "neighbour"
    technique, whereby the use of a special patch name
    activates special calls in GROUND which are to be
    included in GREX.

    It will be useful to extend the series further, so as
    to illustrate how two-phase flow can be handled on
    tube and shell sides of a boiler, and to show also how
    cooling-tower problems can be handled with the aid of
    this technique.
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(Transient Counterflow  Heat Exchr.      )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 790
 ************************************************************
  Group 2. Time dependence
 STEADY = F
    * Set overall time and no. of steps
 TFIRST =0. ;TLAST =20.
 FSTEP = 1 ;LSTEP = 20
 TFRAC(1)=0.05 ;TFRAC(2)=0.1
 TFRAC(3)=0.15 ;TFRAC(4)=0.2
 TFRAC(5)=0.25 ;TFRAC(6)=0.3
 TFRAC(7)=0.35 ;TFRAC(8)=0.4
 TFRAC(9)=0.45 ;TFRAC(10)=0.5
 TFRAC(11)=0.55 ;TFRAC(12)=0.6
 TFRAC(13)=0.65 ;TFRAC(14)=0.7
 TFRAC(15)=0.75 ;TFRAC(16)=0.8
 TFRAC(17)=0.85 ;TFRAC(18)=0.9
 TFRAC(19)=0.95 ;TFRAC(20)=1.
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 20
 XULAST =10.
 XFRAC(1)=0.05 ;XFRAC(5)=0.25
 XFRAC(9)=0.45 ;XFRAC(13)=0.65
 XFRAC(17)=0.85
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 1
 YVLAST =1.
 YFRAC(1)=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(14)=1STH ;NAME(15)=2NDH
 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(1STH,Y,Y,N,N,N,Y)
 SOLUTN(2NDH,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(1STH,N,N,N,Y,Y,Y)
 TERMS(2NDH,N,N,N,Y,N,Y)
 DIFCUT =0.5 ;ZDIFAC =1.
 GALA = F ;ADDDIF = F
 HUNIT =1.
 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(1STH)=1. ;FIINIT(2NDH)=0.
 FIINIT(VPOR)=1.0E-05 ;FIINIT(EPOR)=0.5
   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(INLET1 ,CELL , 1, 1, 1, 1, 1, 1, 1, 1000)
 COVAL(INLET1 ,1STH,0.1 ,1. )
 
 PATCH(INLET2 ,CELL , 20, 20, 1, 1, 1, 1, 1, 1000)
 COVAL(INLET2 ,2NDH,0.1 ,0. )
 
 PATCH(NEW1 ,CELL , 2, 20, 1, 1, 1, 1, 1, 1000)
 COVAL(NEW1 ,1STH,0.1 , GRND8 )
 
 PATCH(NEE1 ,CELL , 1, 19, 1, 1, 1, 1, 1, 1000)
 COVAL(NEE1 ,2NDH,0.1 , GRND8 )
 
 PATCH(NEPLUS ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 1000)
 COVAL(NEPLUS ,1STH,0.05 , GRND8 )
 
 PATCH(NEMINUS ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 1000)
 COVAL(NEMINUS ,2NDH,0.05 , GRND8 )
 
 PATCH(NEOLD ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 20)
 COVAL(NEOLD ,1STH,0.5 , GRND8 )
 COVAL(NEOLD ,2NDH,0.5 , GRND8 )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 25 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 SELREF = T
 RESFAC =1.0E-04
 ************************************************************
  Group 16. Terminate Iterations
 LITER(1STH)=20 ;LITER(2NDH)=20
 ENDIT(1STH)=1.0E-03 ;ENDIT(2NDH)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(1STH,FALSDT,1.0E+09)
 RELAX(2NDH,FALSDT,1.0E+09)
 OVRRLX =0.
 EXPERT = F ;NNORSL = F
 ************************************************************
  Group 18. Limits
 VARMAX(1STH)=1.0E+10 ;VARMIN(1STH)=-1.0E+10
 VARMAX(2NDH)=1.0E+10 ;VARMIN(2NDH)=-1.0E+10
 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
 ISG62 = 1
 ************************************************************
  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(1STH,N,N,Y,Y,Y,Y)
 OUTPUT(2NDH,N,N,Y,Y,Y,Y)
 OUTPUT(VPOR,N,N,N,N,N,N)
 OUTPUT(EPOR,N,N,N,N,N,N)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 10 ;IYMON = 1 ;IZMON = 1
 NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = 5
 UWATCH = T ;USTEER = T
 HIGHLO = F
 ************************************************************
  Group 23.Field Print-Out & Plot Control
 NPRINT = 100000 ;NUMCLS = 5
 NTPRIN = 100000 ;ISTPRF = 1 ;ISTPRL = 100000
 NXPRIN = 4 ;IXPRF = 1 ;IXPRL = 10000
 IPLTF = 1 ;IPLTL = 50 ;NPLT = 1
 ISWPRF = 1 ;ISWPRL = 100000
 ITABL = 3 ;IPROF = 3
 ABSIZ =0.5 ;ORSIZ =0.4
 NTZPRF = 1 ;NCOLPF = 50
 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20
 
 PATCH(PROFILES,PROFIL, 1, 20, 1, 1, 1, 1, 1, 1000)
 PLOT(PROFILES,1STH,0. ,1. )
 PLOT(PROFILES,2NDH,0. ,1. )
 
 PATCH(TIMEPLOT,PROFIL, 20, 20, 1, 1, 1, 1, 1, 20)
 PLOT(TIMEPLOT,1STH,0. ,1. )
 PLOT(TIMEPLOT,2NDH,0. ,1. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP