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



  msg Temperature contours
  con h1 z 1 fi;0.001
  con h1 z 19 fi;0.001
  con h1 z 39 fi;0.001
  con h1 z 59 fi;0.001
  con h1 z 79 fi;0.001
  con h1 z 99 fi;0.001
  pause;con off;red
  msg the grid
  gr y m
  gr z m
  pause;gr off;red
  view z;con h1 z m fi;0.0001
  msg Temperature contours at outlet plane
  pause;con off;red
  msg velocity vectors at outlet plane
  set ref vec 0.3
  vec z m sh;pause;con off;vec off;red
  msg pressure contours at outlet plane
  con p1 z m sh;int 50
  ENDUSE
  DISPLAY
  Air flows at low Reynolds Number along a horizontal pipe of
  circular cross-section, the wall of which is at a higher
  temperature than the entering air.

  Natural convection (ie buoyancy) creates a circulation in the
  cross-sectional plane, superimposed on the Poiseille-like
  longitudinal motion.

  The parabolic mode permits use of a fine grid in the longitud-
  inal direction. 40 000 cells are used,in effect, although the
  storage used is that apporpriate to 400.

             ^       .-.-----------------------------.
      |      |r    /     \                             \
     g|      |   -|-->    |   Pipe wall is at           |->
      v          -|-->    |   constant temp., TWAL      |->
           Fixed   \     /                             /
           mass flux `-'-----------------------------'
           with temp. TIN         z---->
  ENDDIS
 ************************************************************
  Group 1. Run Title and Number
 ************************************************************
 ************************************************************
 
 TEXT(Free Convection In Horizontal Pipe      )
 
 ************************************************************
 ************************************************************
 
 IRUNN = 1 ;LIBREF = 14
 ************************************************************
  Group 2. Time dependence
 STEADY = T
 ************************************************************
  Group 3. X-Direction Grid Spacing
 CARTES = F
 NX = 20
 XULAST =3.14159
 XFRAC(1)=0.05 ;XFRAC(3)=0.15
 XFRAC(5)=0.25 ;XFRAC(7)=0.35
 XFRAC(9)=0.45 ;XFRAC(11)=0.55
 XFRAC(13)=0.65 ;XFRAC(15)=0.75
 XFRAC(17)=0.85 ;XFRAC(19)=0.95
 ************************************************************
  Group 4. Y-Direction Grid Spacing
 NY = 20
 YVLAST =1.0E-02
 YFRAC(1)=0.074055 ;YFRAC(3)=0.216339
 YFRAC(5)=0.350481 ;YFRAC(7)=0.475953
 YFRAC(9)=0.592109 ;YFRAC(11)=0.698131
 YFRAC(13)=0.792937 ;YFRAC(15)=0.875
 YFRAC(17)=0.941905 ;YFRAC(19)=0.98882
 ************************************************************
  Group 5. Z-Direction Grid Spacing
 PARAB = T
 NZ = 100
 ZWLAST =0.1
 ZFRAC(1)=1.0E-02 ;ZFRAC(11)=0.11
 ZFRAC(21)=0.21 ;ZFRAC(31)=0.31
 ZFRAC(41)=0.41 ;ZFRAC(51)=0.51
 ZFRAC(61)=0.61 ;ZFRAC(71)=0.71
 ZFRAC(81)=0.81 ;ZFRAC(91)=0.91
 ************************************************************
  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(14)=H1
    * 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(V1,Y,Y,N,N,N,Y)
 SOLUTN(W1,Y,Y,N,N,N,Y)
 SOLUTN(H1,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(P1,Y,Y,Y,N,Y,Y)
 TERMS(U1,Y,Y,Y,Y,Y,Y)
 TERMS(V1,Y,Y,Y,Y,Y,Y)
 TERMS(W1,Y,Y,Y,Y,Y,Y)
 TERMS(H1,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 =1. ;TMP1 =0. ;EL1 =0.
 TSURR =0. ;TEMP0 =0. ;PRESS0 =0.
 DVO1DT =3.316832 ;DRH1DP =0.
 EMISS =0. ;SCATT =0.
 RADIA =0. ;RADIB =0.
 ENUL =1.0E-05 ;ENUT =0.
 PRNDTL(U1)=1. ;PRNDTL(V1)=1.
 PRNDTL(W1)=1. ;PRNDTL(H1)=0.7
 PRT(U1)=1. ;PRT(V1)=1.
 PRT(W1)=1. ;PRT(H1)=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(H1)=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(UNIFORM ,LOW , 1, 20, 1, 20, 1, 1, 1, 1)
 COVAL(UNIFORM ,P1 , FIXFLU ,0.2 )
 COVAL(UNIFORM ,U1 ,0. ,0. )
 COVAL(UNIFORM ,V1 ,0. ,0. )
 COVAL(UNIFORM ,W1 ,0. ,0.2 )
 COVAL(UNIFORM ,H1 ,0. ,20. )
 
 PATCH(PIPE ,NWALL , 1, 20, 20, 20, 1, 100, 1, 1)
 COVAL(PIPE ,U1 ,1. ,0. )
 COVAL(PIPE ,W1 ,1. ,0. )
 COVAL(PIPE ,H1 ,1. ,40. )
 
 PATCH(BUOY ,PHASEM, 1, 20, 1, 20, 1, 100, 1, 1)
 COVAL(BUOY ,U1 , FIXFLU , GRND3 )
 COVAL(BUOY ,V1 , FIXFLU , GRND3 )
 XCYCLE = F
 EGWF = T
 WALLCO = GRND2
 BUOYA =0. ; BUOYB =-9.81 ; BUOYC =0.
 BUOYE =20.
 ************************************************************
  Group 14. Downstream Pressure For PARAB
 IPARAB = 0
 AZPH =0. ;PBAR =0.
 ************************************************************
  Group 15. Terminate Sweeps
 LSWEEP = 1 ;ISWC1 = 1
 LITHYD = 20 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
 SELREF = T
 RESFAC =0.1
 ************************************************************
  Group 16. Terminate Iterations
 LITER(P1)=20 ;LITER(U1)=10
 LITER(V1)=10 ;LITER(W1)=10
 LITER(H1)=20
 ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
 ENDIT(V1)=1.0E-03 ;ENDIT(W1)=1.0E-03
 ENDIT(H1)=1.0E-03
 ************************************************************
  Group 17. Relaxation
 RELAX(P1,LINRLX,1.)
 RELAX(U1,FALSDT,1.)
 RELAX(V1,FALSDT,1.)
 RELAX(W1,FALSDT,1.)
 RELAX(H1,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(H1)=1.0E+10 ;VARMIN(H1)=-1.0E+10
 ************************************************************
  Group 19. Data transmitted to GROUND
 PARSOL = F
 CONWIZ = T
 ISG62 = 1
 SPEDAT(SET,GXMONI,PLOTALL,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,Y,Y,Y)
 OUTPUT(U1,Y,N,Y,Y,Y,Y)
 OUTPUT(V1,Y,N,Y,Y,Y,Y)
 OUTPUT(W1,Y,N,Y,Y,Y,Y)
 OUTPUT(H1,Y,N,Y,Y,Y,Y)
 ************************************************************
  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 = 2 ;IXPRF = 1 ;IXPRL = 10000
 NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000
 NZPRIN = 10 ;IZPRF = 100 ;IZPRL = 100
 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(EXIT ,CONTUR, 1, 20, 1, 20, 100, 100, 1, 1)
 PLOT(EXIT ,H1 ,0. ,40. )
 ************************************************************
  Group 24. Dumps For Restarts
 SAVE = T ;NOWIPE = F
 NSAVE =CHAM
 IDISPA = 1 ;IDISPB = 0 ;IDISPC = 0
STOP