TALK=T;RUN(1,1) DISPLAY A piston with a flat crown having an open cavity with a central cusp moves inside a flat topped cylinder. The solution domain is represented by a 2-part moving grid, the first part of which expands and contracts in the Z-direction. The second part of the grid moves with the piston, but does not change its size. This part of the grid includes the piston cavity, which is represented by porosities. Since the model simulates only the compression and expansion parts of the four-stroke cycle, there are no inflow or outflow boundaries. The flow is represented in two-dimensional axi-symmetric polar coordinates in the Y-Z plane but with swirl velocity in the X-direction. An initial field of U-velocity is set up to represent 'solid body' rotation of the fluid. The density varies isentropically with pressure. This is based on the PHOENICS-81 PDR/CHAM UK/6. ENDDIS ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(Case 1 AXI-Symmetric Piston Bowl ) ************************************************************ ************************************************************ IRUNN = 1 ;LIBREF = 14 ************************************************************ Group 2. Time dependence STEADY = F * Set overall time and no. of steps TFIRST =1.157407E-04 ;TLAST =0.033681 FSTEP = 1 ;LSTEP = 10 Method of pairs used for grid setting. TFRAC(1)=-7. ;TFRAC(2)=0.034483 TFRAC(3)=18. ;TFRAC(4)=0.017241 TFRAC(5)=40. ;TFRAC(6)=3.448276E-03 TFRAC(7)=4. ;TFRAC(8)=0.017241 TFRAC(9)=7. ;TFRAC(10)=0.034483 ************************************************************ Group 3. X-Direction Grid Spacing CARTES = F NX = 1 XULAST =0.1 XFRAC(1)=1. ************************************************************ Group 4. Y-Direction Grid Spacing NY = 11 YVLAST =0.0689 YFRAC(1)=0.073 ;YFRAC(2)=0.145 YFRAC(3)=0.218 ;YFRAC(4)=0.29 YFRAC(5)=0.363 ;YFRAC(6)=0.421 YFRAC(7)=0.458 ;YFRAC(8)=0.508 YFRAC(9)=0.653 ;YFRAC(10)=0.753 YFRAC(11)=0.88632 ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 11 ZWLAST =0.1707 ZFRAC(1)=0.227 ;ZFRAC(2)=0.518 ZFRAC(3)=0.673 ;ZFRAC(4)=0.776 ZFRAC(5)=0.825 ;ZFRAC(6)=0.853 ZFRAC(7)=0.882 ;ZFRAC(8)=0.926 ZFRAC(9)=0.953 ;ZFRAC(10)=0.982 ZFRAC(11)=1. ************************************************************ 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(149)=PRPS * 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,Y,N,N,N) 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(PRPS,Y,N,N,N,N,N) PRPS = 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(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) DIFCUT =0.5 ;ZDIFAC =1. GALA = F ;ADDDIF = F NEWRH1 = T U1AD =0. ;V1AD =0. ;W1AD = ZMOVE ISOLX = -1 ;ISOLY = -1 ;ISOLZ = -1 ************************************************************ Group 9. Properties used if PRPS is not stored, and where PRPS = -1.0 if it is! RHO1 = GRND3 ;TMP1 =0. ;EL1 =0. TSURR =0. ;TEMP0 =0. ;PRESS0 =1.03E+05 DVO1DT =0. ;DRH1DP = GRND3 RHO1A =1.4839E-04 ;RHO1B =0.765 ;RHO1C =0. EMISS =0. ;SCATT =0. RADIA =0. ;RADIB =0. ENUL =1.0E-05 ;ENUT =0.1 PRNDTL(U1)=1. ;PRNDTL(V1)=1. PRNDTL(W1)=1. PRT(U1)=1. ;PRT(V1)=1. PRT(W1)=1. CP1 =1. ;CP2 =1. ************************************************************ Group 10.Inter-Phase Transfer Processes ************************************************************ Group 11.Initial field variables (PHIs) FIINIT(P1)=1.0E-10 ;FIINIT(U1)=407.130005 FIINIT(V1)=1.0E-10 ;FIINIT(W1)=1.0E-10 FIINIT(PRPS)=-1. PATCH(CMP0 ,INIVAL, 1, 1, 8, 11, 6, 11, 1, 1) INIT(CMP0 ,PRPS,0. ,198. ) INIADD = F FSWEEP = 1 IURINI = -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(HEAD ,LWALL , 1, 1, 1, 11, 1, 1, 1, 10) COVAL(HEAD ,U1 , GRND2 ,0. ) COVAL(HEAD ,V1 , GRND2 ,0. ) PATCH(WALL ,NWALL , 1, 1, 11, 11, 1, 5, 1, 10) COVAL(WALL ,U1 , GRND2 ,0. ) COVAL(WALL ,W1 , GRND2 ,0. ) XCYCLE = F EGWF = T WALLCO = GRND2 ************************************************************ Group 14. Downstream Pressure For PARAB ************************************************************ Group 15. Terminate Sweeps LSWEEP = 20 ;ISWC1 = 1 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1 SELREF = T RESFAC =1.0E-05 ************************************************************ Group 16. Terminate Iterations LITER(P1)=10 ;LITER(U1)=10 LITER(V1)=10 ;LITER(W1)=10 ENDIT(P1)=1.0E-03 ;ENDIT(U1)=1.0E-03 ENDIT(V1)=1.0E-03 ;ENDIT(W1)=1.0E-03 ************************************************************ Group 17. Relaxation RELAX(P1,LINRLX,1.) RELAX(U1,FALSDT,1.) RELAX(V1,FALSDT,0.1) RELAX(W1,FALSDT,0.1) RELAX(PRPS,LINRLX,1.) OVRRLX =0. EXPERT = F ;NNORSL = F ************************************************************ Group 18. Limits VARMAX(P1)=1.0E+10 ;VARMIN(P1)=5.0E+04 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(PRPS)=1.0E+10 ;VARMIN(PRPS)=-1.0E+10 ************************************************************ Group 19. Data transmitted to GROUND PARSOL = F IZW1 = 5 AZW1 =150.796005 ;BZW1 =0.06985 CZW1 =3.7265 ;DZW1 =0. ISG62 = 1 SPEDAT(SET,GXMONI,TRANSIENT,L,F) SPEDAT(SET,GXMONI,PLOTALL,L,T) SPEDAT(SET,MATERIAL,198,L,T) ************************************************************ Group 20. Preliminary Printout ************************************************************ Group 21. Print-out of Variables INIFLD = F ;SUBWGR = T * 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(PRPS,Y,N,Y,N,N,N) ************************************************************ Group 22. Monitor Print-Out IXMON = 1 ;IYMON = 1 ;IZMON = 5 NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = 1 UWATCH = T ;USTEER = T HIGHLO = F ************************************************************ Group 23.Field Print-Out & Plot Control NPRINT = 100000 ;NUMCLS = 5 NTPRIN = 100000 ;ISTPRF = 1 ;ISTPRL = 100000 NYPRIN = -1 ;IYPRF = 1 ;IYPRL = 10000 NZPRIN = -1 ;IZPRF = 1 ;IZPRL = 10000 XZPR = F ;YZPR = F IPLTF = 1 ;IPLTL = -1 ;NPLT = -1 ISWPRF = 1 ;ISWPRL = 100000 ITABL = 2 ;IPROF = 1 ABSIZ =0.5 ;ORSIZ =0.4 NTZPRF = 1 ;NCOLPF = 50 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20 PATCH(PROF ,PROFIL, 1, 1, 1, 11, 3, 3, 10, 10) PLOT(PROF ,U1 ,0. ,0. ) PLOT(PROF ,V1 ,0. ,0. ) PLOT(PROF ,W1 ,0. ,0. ) PATCH(CONT ,CONTUR, 1, 1, 1, 11, 1, 11, 10, 10) PLOT(CONT ,U1 ,0. ,20. ) PLOT(CONT ,W1 ,0. ,20. ) ************************************************************ Group 24. Dumps For Restarts SAVE = T ;NOWIPE = F NSAVE =CHAM STOP