TALK=T;RUN(1,1) photon use p msg Temperature contours con temp z 1 fi;0.1 msg msg Press return for velocity vectors pause;con off; red vec z 1 sh msg Press return for pressure contours pause;vec off; red msg msg Pressure contours con p1 z 1 fi;0.1 msg Press return for streamlines pause;con off;red;stre 2d z 1;int 10 msg Press e to END enduse DISPLAY ****************************************************************** * A horizontal cold pipe, eg containing liquefied natural gas, * * is insulated by a cylindrical blanket of glass wool, through * * which air can circulate slowly by natural convection, as a * * result of which the heat transfer rate is considerably larger * * than if conduction were the only mechanism. * * * * The governing dimensionless parameters are: * *1.The Prandtl number, in which it is the effective conductivity * * of the glass wool which should enter, * *2.the Rayleigh number, ie * * grav * DVO1DT * deltaT * diam**3/vis**2, * *3.and the ratio of average air-passage width in the glass wool * * to the pipe diameter. * * * * The values chosen here are Pr = 0.5, Ra = 1.e8, Wi = 1.e-4 * * * ****************************************************************** ENDDIS ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(Free Convection In A Porous Medium ) ************************************************************ ************************************************************ 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(6)=0.3 XFRAC(11)=0.55 ;XFRAC(16)=0.8 ************************************************************ Group 4. Y-Direction Grid Spacing NY = 20 YVLAST =1. RINNER =1. ;SNALFA =0. YFRAC(1)=0.05 ;YFRAC(4)=0.2 YFRAC(7)=0.35 ;YFRAC(10)=0.5 YFRAC(13)=0.65 ;YFRAC(16)=0.8 YFRAC(19)=0.95 ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 1 ZWLAST =1.1054 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 * 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,Y,N,Y) SOLUTN(V1,Y,Y,N,Y,N,Y) SOLUTN(TEMP,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(TEMP,N,Y,Y,N,Y,N) 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 =2.0E+07 ;DRH1DP =0. EMISS =0. ;SCATT =0. RADIA =0. ;RADIB =0. ENUL =1. ;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)=0.4 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(INNERWAL,SWALL , 1, 20, 1, 1, 1, 1, 1, 1) COVAL(INNERWAL,U1 ,1. ,0. ) COVAL(INNERWAL,TEMP,1. ,0. ) PATCH(OUTERWAL,NWALL , 1, 20, 20, 20, 1, 1, 1, 1) COVAL(OUTERWAL,U1 ,1. ,0. ) COVAL(OUTERWAL,TEMP,1. ,1. ) PATCH(PRELIEF ,CELL , 10, 10, 1, 1, 1, 1, 1, 1) COVAL(PRELIEF ,P1 ,1. ,0. ) COVAL(PRELIEF ,TEMP,0. , SAME ) PATCH(BUOYANCY,VOLUME, 1, 20, 1, 20, 1, 1, 1, 1) COVAL(BUOYANCY,U1 , FIXFLU , GRND3 ) COVAL(BUOYANCY,V1 , FIXFLU , GRND3 ) PATCH(MEDIUM ,VOLUME, 1, 20, 1, 20, 1, 1, 1, 1) COVAL(MEDIUM ,U1 ,5000. ,0. ) COVAL(MEDIUM ,V1 ,5000. ,0. ) XCYCLE = F EGWF = T WALLCO = GRND2 BUOYA =0. ; BUOYB =-1. ; BUOYC =0. BUOYD =2.0E+07 ************************************************************ Group 14. Downstream Pressure For PARAB ************************************************************ Group 15. Terminate Sweeps LSWEEP = 200 ;ISWC1 = 1 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1 SELREF = T RESFAC =0.1 ************************************************************ Group 16. Terminate Iterations LITER(P1)=100 ;LITER(U1)=10 LITER(V1)=10 ;LITER(TEMP)=10 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,9.999E-06) RELAX(V1,FALSDT,9.999E-06) RELAX(TEMP,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(TEMP)=1.0E+10 ;VARMIN(TEMP)=-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(P1,N,Y,Y,Y,Y,Y) OUTPUT(U1,N,Y,Y,Y,Y,Y) OUTPUT(V1,N,Y,Y,Y,Y,Y) OUTPUT(TEMP,N,Y,Y,Y,Y,Y) ************************************************************ Group 22. Monitor Print-Out IXMON = 10 ;IYMON = 5 ;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 = 5 ;IXPRF = 1 ;IXPRL = 10000 NYPRIN = 3 ;IYPRF = 1 ;IYPRL = 10000 IPLTF = 1 ;IPLTL = 200 ;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(TX1 ,PROFIL, 1, 1, 1, 20, 1, 1, 1, 1) PLOT(TX1 ,TEMP,0. ,0. ) PATCH(TNX ,PROFIL, 20, 20, 1, 20, 1, 1, 1, 1) PLOT(TNX ,TEMP,0. ,0. ) PATCH(TNX2 ,PROFIL, 10, 10, 1, 20, 1, 1, 1, 1) PLOT(TNX2 ,U1 ,0. ,0. ) PLOT(TNX2 ,TEMP,0. ,0. ) PATCH(TCON ,CONTUR, 1, 30, 1, 30, 1, 1, 1, 1) PLOT(TCON ,TEMP,0. ,20. ) ************************************************************ Group 24. Dumps For Restarts SAVE = T ;NOWIPE = F NSAVE =CHAM STOP