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

  msg potential contours and velocity vectors
  con pot x 1 fi;0.05;  con pot y 1 fi;0.05
  set ref vec 40.0; vec x 1; vec y 1 ;pause
  msg pressure contours
  con p1 x 1 fi;0.05;  con p1 y 1 fi;0.05
  msg Press e to END
  ENDUSE
  DISPLAY
  This is a more economical version of the calculation performed
  by the "darcy-flow" technique in case 275. Only the potential-
  flow equation is solved. The imposed potential difference is
  chosen so that the velocities are approximately the same as before
  The Q1 contains PHOTON USE commands. Put use q1 in the u file in
  order to activate them.
  ENDDIS
  DISPLAY
    This case differs from case 276 only by activation of the
    conjugate-gradient solver
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(Pot. Flow Around Van; CNGR. Solver      )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 276
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = T
 NX = 8
 XULAST =1.
 XFRAC(1)=0.5 ;XFRAC(5)=2.8
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 12
 YVLAST =1.
   Method of pairs used for grid setting.
 YFRAC(1)=-6. ;YFRAC(2)=0.5
 YFRAC(3)=5. ;YFRAC(4)=1.
 YFRAC(5)=1. ;YFRAC(6)=2.
 ************************************************************
  Group 5. Z-Direction Grid Spacing
 PARAB = F
 NZ = 20
 ZWLAST =20.
 ZFRAC(1)=0.05 ;ZFRAC(2)=0.1
 ZFRAC(3)=0.15 ;ZFRAC(4)=0.2
 ZFRAC(5)=0.25 ;ZFRAC(6)=0.3
 ZFRAC(7)=0.35 ;ZFRAC(8)=0.4
 ZFRAC(9)=0.45 ;ZFRAC(10)=0.5
 ZFRAC(11)=0.55 ;ZFRAC(12)=0.6
 ZFRAC(13)=0.65 ;ZFRAC(14)=0.7
 ZFRAC(15)=0.75 ;ZFRAC(16)=0.8
 ZFRAC(17)=0.85 ;ZFRAC(18)=0.9
 ZFRAC(19)=0.95 ;ZFRAC(20)=1.
 ************************************************************
  Group 6. Body-Fitted Coordinates
 ************************************************************
  Group 7. Variables: STOREd,SOLVEd,NAMEd
 ONEPHS = T
 NAME(1)=P1 ;NAME(3)=U1
 NAME(5)=V1 ;NAME(7)=W1
 NAME(148)=PRPS ;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(P1,Y,N,N,N,N,Y)
 SOLUTN(U1,Y,N,N,N,N,Y)
 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(POT,Y,Y,Y,N,N,Y)
 PRPS = 148
 ************************************************************
  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,N,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(P1)=1.0E-10 ;FIINIT(U1)=1.0E-10
 FIINIT(V1)=1.0E-10 ;FIINIT(W1)=1.0E-10
 FIINIT(PRPS)=-1. ;FIINIT(POT)=1.0E-10
 
 PATCH(CMP0 ,INIVAL, 1, 3, 2, 3, 6, 10, 1, 1)
 INIT(CMP0 ,PRPS,0. ,199. )
 
 PATCH(CMP1 ,INIVAL, 1, 3, 4, 6, 7, 10, 1, 1)
 INIT(CMP1 ,PRPS,0. ,199. )
 
 PATCH(CMP2 ,INIVAL, 3, 3, 1, 1, 6, 6, 1, 1)
 INIT(CMP2 ,PRPS,0. ,199. )
 
 PATCH(CMP3 ,INIVAL, 3, 3, 1, 1, 10, 10, 1, 1)
 INIT(CMP3 ,PRPS,0. ,199. )
 
 PATCH(INITIAL ,LINVLZ, 1, 8, 1, 12, 1, 20, 1, 1)
 INIT(INITIAL ,POT ,-14. ,280. )
 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(UPSTRM ,LOW , 1, 8, 1, 12, 1, 1, 1, 1)
 COVAL(UPSTRM ,POT , FIXVAL ,280. )
 
 PATCH(DWNSTRM ,HIGH , 1, 8, 1, 12, 20, 20, 1, 1)
 COVAL(DWNSTRM ,POT , FIXVAL ,0. )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 3 ;ISWC1 = 1
 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 SELREF = T
 RESFAC =1.0E-04
 ************************************************************
  Group 16. Terminate Iterations
 LITER(POT)=-100
 ENDIT(POT)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(U1,LINRLX,1.)
 RELAX(V1,LINRLX,1.)
 RELAX(W1,LINRLX,1.)
 RELAX(PRPS,LINRLX,1.)
 RELAX(POT,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(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06
 VARMAX(PRPS)=1.0E+10 ;VARMIN(PRPS)=-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
 CSG3    ='CNGR'
 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(P1,Y,N,Y,N,N,N)
 OUTPUT(U1,Y,N,N,N,N,N)
 OUTPUT(V1,Y,N,N,N,N,N)
 OUTPUT(W1,Y,N,N,N,N,N)
 OUTPUT(PRPS,Y,N,Y,N,N,N)
 OUTPUT(POT,Y,N,N,N,N,N)
 ************************************************************
  Group 22. Monitor Print-Out
 IXMON = 5 ;IYMON = 5 ;IZMON = 5
 NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = 1
 UWATCH = T ;USTEER = T
 HIGHLO = F
 ************************************************************
  Group 23.Field Print-Out & Plot Control
 NPRINT = 100000 ;NUMCLS = 5
 NXPRIN = 4 ;IXPRF = 1 ;IXPRL = 10000
 NYPRIN = -1 ;IYPRF = 1 ;IYPRL = 10000
 NZPRIN = -1 ;IZPRF = 4 ;IZPRL = 13
 XZPR = F ;YZPR = T
 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(PROFILE ,PROFIL, 7, 7, 6, 6, 1, 20, 1, 1)
 PLOT(PROFILE ,U1 ,0. ,0. )
 PLOT(PROFILE ,V1 ,0. ,0. )
 PLOT(PROFILE ,W1 ,0. ,0. )
 PLOT(PROFILE ,POT ,0. ,0. )
 
 PATCH(XEQ1 ,CONTUR, 1, 1, 1, 12, 1, 20, 1, 1)
 PLOT(XEQ1 ,U1 ,0. ,20. )
 PLOT(XEQ1 ,V1 ,0. ,20. )
 PLOT(XEQ1 ,W1 ,0. ,20. )
 PLOT(XEQ1 ,POT ,0. ,20. )
 
 PATCH(XEQ5 ,CONTUR, 1, 1, 1, 12, 1, 20, 1, 1)
 PLOT(XEQ5 ,W1 ,0. ,20. )
 PLOT(XEQ5 ,POT ,0. ,20. )
 
 PATCH(WAKE ,CONTUR, 1, 8, 1, 12, 15, 15, 1, 1)
 PLOT(WAKE ,W1 ,0. ,20. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
STOP