TALK=T;RUN(1,1) PHOTON USE p phi msg Potential flow past a perpendicular plate msg set ref vec 5 msg Velocity vectors: gr ou x 1;vec x 1 sh msg msg Pressto continue pause vec off;red msg Axial velocity contours: con w1 x 1 fi;.01 msg msg Press to continue pause con off;red msg Streamlines and contours of velocity potential: con pot x 1 sh; int 20 stre 2d x 1 sh; int 20 msg Press e to END enduse DISPLAY An inviscid fluid flows steadily in a direction normal to a flat plate. Since the potential-flow equation involves only diffusion- type terms, sources, convection and transient terms are switched off automatically within EARTH. The geometry of the problem is as follows: frictionless wall ----------------------------------------------------- --------> ----> --------> ----> ^ ----> Plate ----> | | y| ---------------------------|------------------------- | frictionless wall z---> The plate is introduced by the setting of HPOR to zero for the appropriate cells. ENDDIS ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(Pot. Flow; Perp. Plate; Conj.GR. ) ************************************************************ ************************************************************ IRUNN = 1 ;LIBREF = 115 ************************************************************ Group 2. Time dependence STEADY = T ************************************************************ Group 3. X-Direction Grid Spacing CARTES = T NX = 1 XULAST =1. XFRAC(1)=1. ************************************************************ Group 4. Y-Direction Grid Spacing NY = 40 YVLAST =4. YFRAC(1)=0.025 ;YFRAC(5)=0.125 YFRAC(9)=0.225 ;YFRAC(13)=0.325 YFRAC(17)=0.425 ;YFRAC(21)=0.525 YFRAC(25)=0.625 ;YFRAC(29)=0.725 YFRAC(33)=0.825 ;YFRAC(37)=0.925 ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 80 ZWLAST =8. ZFRAC(1)=0.0125 ;ZFRAC(2)=0.025 ZFRAC(3)=0.0375 ;ZFRAC(4)=0.05 ZFRAC(5)=0.0625 ;ZFRAC(6)=0.075 ZFRAC(7)=0.0875 ;ZFRAC(8)=0.1 ZFRAC(9)=0.1125 ;ZFRAC(10)=0.125 ZFRAC(11)=0.1375 ;ZFRAC(12)=0.15 ZFRAC(13)=0.1625 ;ZFRAC(14)=0.175 ZFRAC(15)=0.1875 ;ZFRAC(16)=0.2 ZFRAC(17)=0.2125 ;ZFRAC(18)=0.225 ZFRAC(19)=0.2375 ;ZFRAC(20)=0.25 ZFRAC(21)=0.2625 ;ZFRAC(22)=0.275 ZFRAC(23)=0.2875 ;ZFRAC(24)=0.3 ZFRAC(25)=0.3125 ;ZFRAC(26)=0.325 ZFRAC(27)=0.3375 ;ZFRAC(28)=0.35 ZFRAC(29)=0.3625 ;ZFRAC(30)=0.375 ZFRAC(31)=0.3875 ;ZFRAC(32)=0.4 ZFRAC(33)=0.4125 ;ZFRAC(34)=0.425 ZFRAC(35)=0.4375 ;ZFRAC(36)=0.45 ZFRAC(37)=0.4625 ;ZFRAC(38)=0.475 ZFRAC(39)=0.4875 ;ZFRAC(40)=0.5 ZFRAC(41)=0.5125 ;ZFRAC(42)=0.525 ZFRAC(43)=0.5375 ;ZFRAC(44)=0.55 ZFRAC(45)=0.5625 ;ZFRAC(46)=0.575 ZFRAC(47)=0.5875 ;ZFRAC(48)=0.6 ZFRAC(49)=0.6125 ;ZFRAC(50)=0.625 ZFRAC(51)=0.6375 ;ZFRAC(52)=0.65 ZFRAC(53)=0.6625 ;ZFRAC(54)=0.675 ZFRAC(55)=0.6875 ;ZFRAC(56)=0.7 ZFRAC(57)=0.7125 ;ZFRAC(58)=0.725 ZFRAC(59)=0.7375 ;ZFRAC(60)=0.75 ZFRAC(61)=0.7625 ;ZFRAC(62)=0.775 ZFRAC(63)=0.7875 ;ZFRAC(64)=0.8 ZFRAC(65)=0.8125 ;ZFRAC(66)=0.825 ZFRAC(67)=0.8375 ;ZFRAC(68)=0.85 ZFRAC(69)=0.8625 ;ZFRAC(70)=0.875 ZFRAC(71)=0.8875 ;ZFRAC(72)=0.9 ZFRAC(73)=0.9125 ;ZFRAC(74)=0.925 ZFRAC(75)=0.9375 ;ZFRAC(76)=0.95 ZFRAC(77)=0.9625 ;ZFRAC(78)=0.975 ZFRAC(79)=0.9875 ;ZFRAC(80)=1. ************************************************************ Group 6. Body-Fitted Coordinates ************************************************************ Group 7. Variables: STOREd,SOLVEd,NAMEd ONEPHS = T NAME(5)=V1 ;NAME(7)=W1 NAME(149)=HPOR ;NAME(150)=POT * Y in SOLUTN argument list denotes: * 1-stored 2-solved 3-whole-field * 4-point-by-point 5-explicit 6-harmonic averaging SOLUTN(V1,Y,N,N,N,N,Y) SOLUTN(W1,Y,N,N,N,N,Y) SOLUTN(HPOR,Y,N,N,N,N,Y) SOLUTN(POT,Y,Y,Y,N,N,N) EPOR = 0 ;HPOR = 149 ;NPOR = 0 ;VPOR = 0 ************************************************************ 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(POT,N,Y,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 =1.0E-05 ;ENUT =0. PRNDTL(POT)=1. PRT(POT)=1. CP1 =1. ;CP2 =1. ************************************************************ Group 10.Inter-Phase Transfer Processes ************************************************************ Group 11.Initial field variables (PHIs) FIINIT(V1)=1.0E-10 ;FIINIT(W1)=1.0E-10 FIINIT(HPOR)=1. ;FIINIT(POT)=1.0E-10 PATCH(PLATE ,INIVAL, 1, 1, 1, 20, 40, 40, 1, 1) INIT(PLATE ,HPOR, FIXVAL ,0. ) 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(UPSTRM ,LOW , 1, 1, 1, 40, 1, 1, 1, 1) COVAL(UPSTRM ,POT , FIXVAL ,4. ) PATCH(DWNSTRM ,HIGH , 1, 1, 1, 40, 80, 80, 1, 1) COVAL(DWNSTRM ,POT , FIXVAL ,-4. ) XCYCLE = F EGWF = T WALLCO = GRND2 ************************************************************ Group 14. Downstream Pressure For PARAB ************************************************************ Group 15. Terminate Sweeps LSWEEP = 2 ;ISWC1 = 1 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1 SELREF = T RESFAC =1.0E-05 ************************************************************ Group 16. Terminate Iterations LITER(POT)=-500 ENDIT(POT)=1.0E-03 ************************************************************ Group 17. Relaxation RELAX(V1,LINRLX,1.) RELAX(W1,LINRLX,1.) RELAX(POT,LINRLX,1.) OVRRLX =2.5 EXPERT = F ;NNORSL = F ************************************************************ Group 18. Limits VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06 VARMAX(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06 VARMAX(HPOR)=1.0E+10 ;VARMIN(HPOR)=-1.0E+10 VARMAX(POT)=1.0E+10 ;VARMIN(POT)=-1.0E+10 ************************************************************ Group 19. Data transmitted to GROUND POTVEL = T PARSOL = F ISG62 = 1 CSG3 ='CNGR' 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(V1,Y,N,Y,N,N,N) OUTPUT(W1,Y,N,Y,N,N,N) OUTPUT(HPOR,N,N,N,N,N,N) OUTPUT(POT,Y,Y,Y,Y,N,N) ************************************************************ Group 22. Monitor Print-Out IXMON = 1 ;IYMON = 1 ;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 NYPRIN = 4 ;IYPRF = 1 ;IYPRL = 10000 NZPRIN = -1 ;IZPRF = 16 ;IZPRL = 25 XZPR = F ;YZPR = F 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(CONT ,CONTUR, 1, 1, 1, 40, 1, 80, 1, 1) PLOT(CONT ,POT ,0. ,20. ) ************************************************************ Group 24. Dumps For Restarts SAVE = T ;NOWIPE = F NSAVE =CHAM STOP