TALK=T;RUN(1,1)
DISPLAY
HEAT-EXCHANGER SIMULATIONS BY MEANS OF PHOENICS
These examples make extensive use of the "neighbour"
technique, whereby the use of a special patch name
activates special calls in GROUND which are to be
included in GREX.
It will be useful to extend the series further, so as
to illustrate how two-phase flow can be handled on
tube and shell sides of a boiler, and to show also how
cooling-tower problems can be handled with the aid of
this technique.
ENDDIS
DISPLAY
Transient analysis of a counter-flow heat-exchanger with
allowance for the thermal capacity of the metal.
This Q1 contains PHOTNON USE commands.
ENDDIS
PHOTON USE
p
parphi
msg The computational grid. Note: z = time. Press return for T1
gr y 1
pause
msg T1, 1st-fluid temperature. Note: z = time. Press return for T2
con 1sth y 1 fi;0.05
pause
con off;red
msg T2, 2nd-fluid temperature. Note: z = time. Press return for Tm
con 2ndh y 1 fi;0.05
pause
con off;red
msg Tm, metal temperature. Note: z = time. Press E to end
con metl y 1 fi;0.05
pause
ENDUSE
************************************************************
Group 1. Run Title and Number
************************************************************
************************************************************
TEXT(791 + Allowance For Metal Capacity )
************************************************************
************************************************************
IRUNN = 1 ;LIBREF = 791
************************************************************
Group 2. Time dependence
STEADY = F
* Set overall time and no. of steps
TFIRST =0. ;TLAST =20.
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 = 20
XULAST =10.
XFRAC(1)=0.05 ;XFRAC(5)=0.25
XFRAC(9)=0.45 ;XFRAC(13)=0.65
XFRAC(17)=0.85
************************************************************
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(14)=1STH ;NAME(15)=2NDH
NAME(16)=METL ;NAME(149)=VPOR
NAME(150)=EPOR
* Y in SOLUTN argument list denotes:
* 1-stored 2-solved 3-whole-field
* 4-point-by-point 5-explicit 6-harmonic averaging
SOLUTN(1STH,Y,Y,N,N,N,Y)
SOLUTN(2NDH,Y,Y,N,N,N,Y)
SOLUTN(METL,Y,Y,N,N,N,Y)
SOLUTN(VPOR,Y,N,N,N,N,Y)
SOLUTN(EPOR,Y,N,N,N,N,Y)
EPOR = 150 ;HPOR = 0 ;NPOR = 0 ;VPOR = 149
************************************************************
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(1STH,N,N,N,Y,Y,Y)
TERMS(2NDH,N,N,N,Y,N,Y)
TERMS(METL,N,N,N,Y,N,N)
DIFCUT =0.5 ;ZDIFAC =1.
GALA = F ;ADDDIF = F
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 =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.
CP1 =1. ;CP2 =1.
************************************************************
Group 10.Inter-Phase Transfer Processes
************************************************************
Group 11.Initial field variables (PHIs)
FIINIT(1STH)=1. ;FIINIT(2NDH)=0.
FIINIT(METL)=0.5 ;FIINIT(VPOR)=1.0E-05
FIINIT(EPOR)=0.5
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(INLET1 ,CELL , 1, 1, 1, 1, 1, 1, 1, 1000)
COVAL(INLET1 ,1STH,0.1 ,1. )
PATCH(INLET2 ,CELL , 20, 20, 1, 1, 1, 1, 1, 1000)
COVAL(INLET2 ,2NDH,0.1 ,0. )
PATCH(NEW1 ,CELL , 2, 20, 1, 1, 1, 1, 1, 1000)
COVAL(NEW1 ,1STH,0.1 , GRND8 )
PATCH(NEE1 ,CELL , 1, 19, 1, 1, 1, 1, 1, 1000)
COVAL(NEE1 ,2NDH,0.1 , GRND8 )
PATCH(NEPLUS ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 1000)
COVAL(NEPLUS ,1STH,0.033333 , GRND8 )
PATCH(NEMINUS ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 1000)
COVAL(NEMINUS ,2NDH,0.033333 , GRND8 )
PATCH(NEOLD ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 20)
COVAL(NEOLD ,1STH,0.5 , GRND8 )
COVAL(NEOLD ,2NDH,0.5 , GRND8 )
COVAL(NEOLD ,METL,0.1 , GRND8 )
PATCH(NEO2 ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 20)
COVAL(NEO2 ,1STH,0.033333 , GRND8 )
PATCH(NEM2 ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 20)
COVAL(NEM2 ,METL,0.033333 , GRND8 )
PATCH(NEO1 ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 20)
COVAL(NEO1 ,2NDH,0.033333 , GRND8 )
PATCH(NEM1 ,VOLUME, 1, 20, 1, 1, 1, 1, 1, 20)
COVAL(NEM1 ,METL,0.033333 , GRND8 )
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(1STH)=20 ;LITER(2NDH)=20
LITER(METL)=20
ENDIT(1STH)=1.0E-03 ;ENDIT(2NDH)=1.0E-03
ENDIT(METL)=1.0E-03
************************************************************
Group 17. Relaxation
RELAX(1STH,FALSDT,1.0E+09)
RELAX(2NDH,FALSDT,1.0E+09)
RELAX(METL,FALSDT,1.0E+09)
OVRRLX =0.
EXPERT = F ;NNORSL = F
************************************************************
Group 18. Limits
VARMAX(1STH)=1.0E+10 ;VARMIN(1STH)=-1.0E+10
VARMAX(2NDH)=1.0E+10 ;VARMIN(2NDH)=-1.0E+10
VARMAX(METL)=1.0E+10 ;VARMIN(METL)=-1.0E+10
VARMAX(VPOR)=1.0E+10 ;VARMIN(VPOR)=-1.0E+10
VARMAX(EPOR)=1.0E+10 ;VARMIN(EPOR)=-1.0E+10
************************************************************
Group 19. Data transmitted to GROUND
PARSOL = F
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(1STH,N,N,Y,Y,Y,Y)
OUTPUT(2NDH,N,N,Y,Y,Y,Y)
OUTPUT(METL,N,N,Y,Y,Y,Y)
OUTPUT(VPOR,N,N,N,N,N,N)
OUTPUT(EPOR,N,N,N,N,N,N)
************************************************************
Group 22. Monitor Print-Out
IXMON = 10 ;IYMON = 1 ;IZMON = 1
NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = 5
UWATCH = T ;USTEER = T
HIGHLO = F
************************************************************
Group 23.Field Print-Out & Plot Control
NPRINT = 100000 ;NUMCLS = 5
NTPRIN = 5 ;ISTPRF = 1 ;ISTPRL = 100000
NXPRIN = 4 ;IXPRF = 1 ;IXPRL = 10000
IPLTF = 1 ;IPLTL = 50 ;NPLT = 1
ISWPRF = 1 ;ISWPRL = 100000
ITABL = 3 ;IPROF = 3
ABSIZ =0.5 ;ORSIZ =0.4
NTZPRF = 1 ;NCOLPF = 50
ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20
PATCH(PROFILES,PROFIL, 1, 20, 1, 1, 1, 1, 1, 1000)
PLOT(PROFILES,1STH,0. ,1. )
PLOT(PROFILES,2NDH,0. ,1. )
PLOT(PROFILES,METL,0. ,1. )
PATCH(TIMEPLOT,PROFIL, 20, 20, 1, 1, 1, 1, 1, 20)
PLOT(TIMEPLOT,1STH,0. ,1. )
PLOT(TIMEPLOT,2NDH,0. ,1. )
PLOT(TIMEPLOT,METL,0. ,1. )
************************************************************
Group 24. Dumps For Restarts
SAVE = T ;NOWIPE = F
NSAVE =CHAM
STOP