TALK=T;RUN(1,1)
photon use
p
parphi
5 5 1
view 1 1 1
msg the grid
msg press RETURN for temperature contours at successive times
gr z 1;pause
do kk=2,20,2
con temp z kk fi;0.01
enddo
msg press RETURN for velocity vectors at successive times
pause;con off;red
do kk=2,20,2
vec z kk sh
enddo
msg press RETURN for C1 contours at successive times
pause
do kk=2,20,2
con c1 z kk fi;0.01
enddo
enduse
DISPLAY
A stationary fluid in a cavity is suddenly exposed to walls of
unequal temperature. Flow is generated by buoyancy forces
acting oppositely on hot and cold parts of the fluid.
----------------------------
/| --------> |/
/| |/
/| ---> |/ |
Hot /| ^ |/ Cold |
wall; /| | ^ | |/ wall; |g
T=1.0 /| | | | | |/ T=-1.0 |
/| | *-- v | |/ |
/| \ v |/ v
/| <--- \ |/
/| \ |/
/| <--------\ |/
-------------------\--------
^ \
y| P1=0.0 at PATCH REFP
|--->
x
Press RETURN to continue
The temperature conditions are applied only after the first time
step so that the correct pressure field can first be established.
Under-relaxation is applied to V1 for this time step only, so as
to facilitate quick establishment of the correct pressure, by
means of the patch called STEP1, with a large CO and with VAL set
as SAME.
The 10 * 10 grid is too coarse for accuracy, but may easily be
refined.
Other interesting variants include changes to:
* the aspect ratio of the cavity;
* the Prandtl number, here taken as 5.0; and
* the Rayleigh number, here taken as about 1.E6.
ENDDIS
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************
TEXT(Transient Free Convection In A Box )
************************************************************
************************************************************
IRUNN = 1 ;LIBREF = 340
************************************************************
Group 2. Time dependence
STEADY = F
* Set overall time and no. of steps
TFIRST =0. ;TLAST =40.
FSTEP = 1 ;LSTEP = 20
TFRAC(1)=0.05 ;TFRAC(6)=0.3
TFRAC(11)=0.55 ;TFRAC(16)=0.8
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 10
XULAST =1.
XFRAC(1)=0.02 ;XFRAC(4)=0.32
XFRAC(7)=0.82 ;XFRAC(10)=1.
************************************************************
Group 4. Y-Direction Grid Spacing
NY = 10
YVLAST =1.
YFRAC(1)=0.02 ;YFRAC(3)=0.18
YFRAC(5)=0.5 ;YFRAC(7)=0.82
YFRAC(9)=0.98
************************************************************
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(1)=P1 ;NAME(3)=U1
NAME(5)=V1 ;NAME(14)=TEMP
NAME(16)=C1 ;NAME(150)=DEN1
* 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(TEMP,Y,Y,N,N,N,Y)
SOLUTN(C1,Y,N,N,N,N,Y)
SOLUTN(DEN1,Y,N,N,N,N,Y)
DEN1 = 150
************************************************************
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(TEMP,N,Y,Y,Y,Y,Y)
DIFCUT =0.5 ;ZDIFAC =1.
GALA = F ;ADDDIF = F
NEWRH1 = T
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 = GRND4 ;TMP1 = GRND2 ;EL1 =0.
TSURR =0. ;TEMP0 =0. ;PRESS0 =0.
DVO1DT =0. ;DRH1DP =0.
RHO1A =1. ;RHO1B =-1.0E-02 ;RHO1C =0.
TMP1A =0. ;TMP1B =1. ;TMP1C =0.
TMP2A =0. ;TMP2B =0. ;TMP2C =0.
EMISS =0. ;SCATT =0.
RADIA =0. ;RADIB =0.
ENUL =1.0E-03 ;ENUT =0.
PRNDTL(U1)=1. ;PRNDTL(V1)=1.
PRNDTL(TEMP)=5.
PRT(U1)=1. ;PRT(V1)=1.
PRT(TEMP)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(P1)=0. ;FIINIT(U1)=0.
FIINIT(V1)=0. ;FIINIT(TEMP)=0.
FIINIT(C1)=1.0E-10 ;FIINIT(DEN1)=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(REFP ,CELL , 5, 5, 5, 5, 1, 1, 1, 20)
COVAL(REFP ,P1 ,1. ,0. )
COVAL(REFP ,U1 ,0. ,0. )
COVAL(REFP ,V1 ,0. ,0. )
COVAL(REFP ,TEMP, FIXVAL , SAME )
PATCH(HOTWALL ,WWALL , 1, 1, 1, 10, 1, 1, 2, 20)
COVAL(HOTWALL ,V1 ,1. ,0. )
COVAL(HOTWALL ,TEMP,1. ,1. )
PATCH(BUOYANCY,PHASEM, 1, 10, 1, 10, 1, 1, 1, 20)
COVAL(BUOYANCY,V1 , FIXFLU ,-9.81 )
PATCH(COLDWALL,EWALL , 10, 10, 1, 10, 1, 1, 2, 20)
COVAL(COLDWALL,V1 ,1. ,0. )
COVAL(COLDWALL,TEMP,1. ,-1. )
PATCH(TOPWALL ,NWALL , 1, 10, 10, 10, 1, 1, 2, 20)
COVAL(TOPWALL ,U1 ,1. ,0. )
PATCH(BOTMWALL,SWALL , 1, 10, 1, 1, 1, 1, 2, 20)
COVAL(BOTMWALL,U1 ,1. ,0. )
PATCH(STEP1 ,CELL , 1, 10, 1, 10, 1, 1, 1, 1)
COVAL(STEP1 ,V1 ,1.0E+05 , SAME )
XCYCLE = F
EGWF = T
WALLCO = GRND2
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 50 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
SELREF = T
RESFAC =1.0E-02
************************************************************
Group 16. Terminate Iterations
LITER(P1)=20 ;LITER(U1)=10
LITER(V1)=10 ;LITER(TEMP)=20
ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03
ENDIT(V1)=1.0E-03 ;ENDIT(TEMP)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(P1,LINRLX,1.)
RELAX(U1,FALSDT,1.)
RELAX(V1,FALSDT,1.)
RELAX(TEMP,FALSDT,1.0E+09)
RELAX(C1,LINRLX,1.)
RELAX(DEN1,LINRLX,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(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06
VARMAX(TEMP)=1.0E+10 ;VARMIN(TEMP)=-1.0E+10
VARMAX(C1)=1.0E+10 ;VARMIN(C1)=-1.0E+10
VARMAX(DEN1)=1.0E+10 ;VARMIN(DEN1)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
PARSOL = F
ISG62 = 1
SPEDAT(SET,GXMONI,TRANSIENT,L,F)
SPEDAT(SET,PRINT,NUMBER,I,5)
SPEDAT(SET,PRINT,COMMAND1,C,TOTAL_TEMP)
SPEDAT(SET,PRINT,COMMAND2,C,POW_TEMP_C1)
SPEDAT(SET,PRINT,POWER,R,0.5)
SPEDAT(SET,PRINT,COMMAND3,C,MINMAX_U1)
SPEDAT(SET,PRINT,COMMAND4,C,AVE_C1)
SPEDAT(SET,PRINT,COMMAND5,C,VALUE_V1)
SPEDAT(SET,PRINT,IXLOC,I,5)
SPEDAT(SET,PRINT,IYLOC,I,5)
SPEDAT(SET,PRINT,IZLOC,I,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,Y,Y,Y,Y,Y)
OUTPUT(U1,Y,Y,Y,Y,Y,Y)
OUTPUT(V1,Y,Y,Y,Y,Y,Y)
OUTPUT(TEMP,Y,Y,Y,Y,Y,Y)
OUTPUT(C1,Y,N,Y,N,N,N)
OUTPUT(DEN1,Y,N,Y,N,N,N)
************************************************************
Group 22. Monitor Print-Out
IXMON = 1 ;IYMON = 9 ;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 = 3 ;IXPRF = 1 ;IXPRL = 10000
NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000
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(CONT ,CONTUR, 1, 10, 1, 10, 1, 1, 1, 20)
PLOT(CONT ,TEMP,0. ,10. )
PATCH(IYEQ5 ,PROFIL, 1, 10, 5, 5, 1, 1, 1, 20)
PLOT(IYEQ5 ,V1 ,-0.1 ,0.1 )
PLOT(IYEQ5 ,TEMP,0. ,1. )
PATCH(IYEQ9 ,PROFIL, 1, 1, 9, 9, 1, 1, 1, 20)
PLOT(IYEQ9 ,TEMP,0. ,1. )
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
IDISPA = 1 ;IDISPB = 0 ;IDISPC = 0
STOP