TALK=T;RUN(1,1) DISPLAY One computational cell is used in this study of the variation of pressure as a piston moves from bottom dead-centre, through top dead-centre, and back. Interesting variations include: alteration of the engine speed; and changes to the ratio of connecting-rod length to crank radius. ENDDIS ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(0D Piston-In-Cylinder Study ) ************************************************************ ************************************************************ IRUNN = 1 ;LIBREF = 14 ************************************************************ Group 2. Time dependence STEADY = F * Set overall time and no. of steps TFIRST =0. ;TLAST =0.523598 FSTEP = 1 ;LSTEP = 20 TFRAC(1)=0.05 ;TFRAC(2)=0.1 TFRAC(3)=0.15 ;TFRAC(4)=0.2 TFRAC(5)=0.25 ;TFRAC(6)=0.3 TFRAC(7)=0.35 ;TFRAC(8)=0.4 TFRAC(9)=0.45 ;TFRAC(10)=0.5 TFRAC(11)=0.55 ;TFRAC(12)=0.6 TFRAC(13)=0.65 ;TFRAC(14)=0.7 TFRAC(15)=0.75 ;TFRAC(16)=0.8 TFRAC(17)=0.85 ;TFRAC(18)=0.9 TFRAC(19)=0.95 ;TFRAC(20)=1. ************************************************************ Group 3. X-Direction Grid Spacing CARTES = T NX = 1 XULAST =1. XFRAC(1)=1. ************************************************************ Group 4. Y-Direction Grid Spacing NY = 1 YVLAST =1. YFRAC(1)=1. ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 1 ZWLAST =0.1 ZFRAC(1)=1. ************************************************************ Group 6. Body-Fitted Coordinates ************************************************************ Group 7. Variables: STOREd,SOLVEd,NAMEd ONEPHS = T NAME(1)=P1 * 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) ************************************************************ 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) 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 =1.0E+05 DVO1DT =0. ;DRH1DP = GRND3 RHO1A =1.484E-04 ;RHO1B =0.714286 ;RHO1C =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(P1)=0. 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 No PATCHes yet used for this Group XCYCLE = F EGWF = T WALLCO = GRND2 ************************************************************ Group 14. Downstream Pressure For PARAB ************************************************************ Group 15. Terminate Sweeps LSWEEP = 5 ;ISWC1 = 1 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1 SELREF = T RESFAC =1.0E-05 ************************************************************ Group 16. Terminate Iterations LITER(P1)=20 ENDIT(P1)=1.0E-03 ************************************************************ Group 17. Relaxation RELAX(P1,LINRLX,1.) OVRRLX =0. EXPERT = F ;NNORSL = F ************************************************************ Group 18. Limits VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10 ************************************************************ Group 19. Data transmitted to GROUND PARSOL = F IZW1 = 1 AZW1 =12. ;BZW1 =0.025 CZW1 =10. ;DZW1 =0. ISG62 = 1 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(P1,Y,N,Y,Y,Y,Y) ************************************************************ Group 22. Monitor Print-Out IXMON = 1 ;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 = 100000 ;ISTPRF = 1 ;ISTPRL = 100000 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(TIMEPLOT,PROFIL, 1, 1, 1, 1, 1, 1, 1, 20) PLOT(TIMEPLOT,P1 ,0. ,0. ) ************************************************************ Group 24. Dumps For Restarts SAVE = T ;NOWIPE = F NSAVE =CHAM STOP