TALK=T;RUN(1,1)
photon use
p
parphi
1 1500 1500
msg contours of reactedness. Distance is vertical, time horizontal
con rctd y 1 fi;0.1
enduse
DISPLAY
This case represents the main features of transient plane
laminar flame propagation through a combustible mixture. The
reaction rate is proportional to (1-r)*r**n, where
r = reactedness, a "progress variable" which changes from 0.0
to 1.0 as reaction proceeds, while n is a constant exponent.
The distance variable x represents:
integral(density * d distance).
In the example provided, the flame propagates from the high-x
end to the low-x end.
It should be found that the speed of propagation is proportional
to the square root of the product of the transport coefficient
(ENUL) and the reaction-rate constant (CHSOA).
-----------------------------------------------------
r=1.e-4 <--| flame-front r=1.
-----------------------------------------------------
x----->
ENDDIS
DISPLAY
Two burned-gas fragments are introduced into a large volume of
cold unburned combustible mixture.
The larger one ignites a self-sustaining flame; but the smaller
one is extinguished.
ENDDIS
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************
TEXT(1D Ignition And Extinction )
************************************************************
************************************************************
IRUNN = 1 ;LIBREF = 109
************************************************************
Group 2. Time dependence
STEADY = F
* Set overall time and no. of steps
TFIRST =0. ;TLAST =1.0E-03
FSTEP = 1 ;LSTEP = 50
TFRAC(1)=0.02 ;TFRAC(13)=0.26
TFRAC(25)=0.5 ;TFRAC(37)=0.74
TFRAC(49)=0.98
************************************************************
Group 3. X-Direction Grid Spacing
CARTES = T
NX = 50
XULAST =1.
XFRAC(1)=0.02 ;XFRAC(11)=0.22
XFRAC(21)=0.42 ;XFRAC(31)=0.62
XFRAC(41)=0.82
************************************************************
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(150)=RCTD
* Y in SOLUTN argument list denotes:
* 1-stored 2-solved 3-whole-field
* 4-point-by-point 5-explicit 6-harmonic averaging
SOLUTN(RCTD,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(RCTD,Y,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 =100. ;ENUT =0.
PRNDTL(RCTD)=1.
PRT(RCTD)=1.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(RCTD)=0.
PATCH(IGNITE1 ,INIVAL, 47, 50, 1, 1, 1, 1, 1, 1)
INIT(IGNITE1 ,RCTD,0. ,1. )
PATCH(IGNITE2 ,INIVAL, 1, 5, 1, 1, 1, 1, 1, 1)
INIT(IGNITE2 ,RCTD,0. ,1. )
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(CHSOTERM,VOLUME, 1, 50, 1, 1, 1, 1, 1, 50)
COVAL(CHSOTERM,RCTD, GRND7 ,1. )
XCYCLE = F
EGWF = T
WALLCO = GRND2
************************************************************
Group 14. Downstream Pressure For PARAB
************************************************************
Group 15. Terminate Sweeps
LSWEEP = 10 ;ISWC1 = 1
LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1
SELREF = T
RESFAC =1.0E-05
************************************************************
Group 16. Terminate Iterations
LITER(RCTD)=20
ENDIT(RCTD)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(RCTD,FALSDT,1.0E+09)
OVRRLX =0.
EXPERT = F ;NNORSL = F
************************************************************
Group 18. Limits
VARMAX(RCTD)=1.0E+10 ;VARMIN(RCTD)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
PARSOL = F
ISG62 = 1
CHSOA =1.0E+05 ;CHSOB =6.
SPEDAT(SET,GXMONI,TRANSIENT,L,F)
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(RCTD,Y,N,Y,Y,Y,Y)
************************************************************
Group 22. Monitor Print-Out
IXMON = 25 ;IYMON = 1 ;IZMON = 1
NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = 2
UWATCH = T ;USTEER = T
HIGHLO = F
************************************************************
Group 23.Field Print-Out & Plot Control
NPRINT = 100000 ;NUMCLS = 5
NTPRIN = 12 ;ISTPRF = 1 ;ISTPRL = 100000
NXPRIN = 10 ;IXPRF = 1 ;IXPRL = 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(XWISE ,PROFIL, 1, 50, 1, 1, 1, 1, 1, 50)
PLOT(XWISE ,RCTD,0. ,0. )
PATCH(TIMEWISE,PROFIL, 25, 37, 1, 1, 1, 1, 1, 50)
PLOT(TIMEWISE,RCTD,0. ,0. )
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
IDISPA = 1 ;IDISPB = 0 ;IDISPC = 0
STOP