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