TALK=T;RUN(1,1) DISPLAY This case concerns plane, two-dimensional, incompressible flow th$ rough a 180 degree turnaround duct, as studied experimentally by Monson$ & Seegmiller (1988). The duct has a width W=0.0381m and an aspect r$ atio of 10. The inlet and outlet planes are located 3.5W upstream and$ downsteam of the bend, respectively. The inner radius of the bend is 0.0190$ 5m, which corresponds to a curvature ratio of 0.5. The Reynolds number base$ d on duct width is 1.E5, and the Dean number is 7.071E4. The flow exhibits$ large streamline curvature with flow relaminarisation along the inner c$ onvex wall together with the fromation of a separation zone near the bend ex$ it on the inner (convex) surface of the duct. The turnaround duct is repres$ entative of many flows of engineering interest, such as flow in the turnar$ ound duct of the Space-Shuttle-Main-Engine powerhead. Calculations are made with several high-Re forms k-e and k-w mode$ l, and the calculation employs a relatively coarse non-uniform mesh of NY=25$ and NZ=80. The standard k-e and k-w models do not predict the occurence of s$ eparation along the inner wall at the exit of the U-bend. The other variant$ s of these models do predict this feature, but with varying size of the sepa$ ration bubble. The current solutions remain sensitive to mesh numbers. Typically$ , depending on the turbulence model used, 450 to 900 sweeps are required for$ complete convergence. Low-Reynolds-number modelling, as exemplified by Lib$ rary Case T214, is recommended to predict the important features of this fl$ ow. ENDDIS PHOTON USE p view x gr ou x 1 msg velocity vectors vec x 1 sh msg pressto continue pause vec off; redr msg contours of normalised w velocity resolutes con w1nr x 1 fi;0.1 msg press to continue pause con del; redr msg contours of turbulence intensities con tint x 1 fi;0.1 msg Press and then to END pause con del; redr msg contours of pressure coefficients con cp x 1 fi;0.1 msg press to continue pause ENDUSE ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(RNG KE-2D FLOW IN TURNAROUND DUCT :T106 ) ************************************************************ ************************************************************ IRUNN = 1 ;LIBREF = 106 ************************************************************ Group 2. Time dependence STEADY = T ************************************************************ Group 3. X-Direction Grid Spacing CARTES = T NX = 1 XULAST =1. ************************************************************ Group 4. Y-Direction Grid Spacing NY = 25 YVLAST =0.0381 ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 80 ZWLAST =0.13335 ************************************************************ Group 6. Body-Fitted Coordinates BFC = T ;NONORT = T NCRT = -1 RSTGEO = F ;SAVGEO = F UUP = F ;VUP = F ;WUP = T NGEOM =CHAM NAMXYZ =CHAM ANGMIN =20. DOMAIN( 1, 2, 1, 26, 1, 1) * Set fixed sub-domain FIXDOM( 1, 0, 0, 0, 0, 0, 0) FIXDOM( 2, 0, 0, 0, 0, 0, 0) FIXDOM( 3, 0, 0, 0, 0, 0, 0) FIXDOM( 4, 0, 0, 0, 0, 0, 0) FIXDOM( 5, 0, 0, 0, 0, 0, 0) FIXDOM( 6, 0, 0, 0, 0, 0, 0) FIXDOM( 7, 0, 0, 0, 0, 0, 0) FIXDOM( 8, 0, 0, 0, 0, 0, 0) FIXDOM( 9, 0, 0, 0, 0, 0, 0) FIXDOM( 10, 0, 0, 0, 0, 0, 0) LIJ = F ;LJK = T ;LIK = F IMON = 1 ;JMON = 13 ;KMON = 1 ************************************************************ Group 7. Variables: STOREd,SOLVEd,NAMEd ONEPHS = T NAME(1)=P1 ;NAME(5)=V1 NAME(7)=W1 ;NAME(12)=KE NAME(13)=EP ;NAME(138)=W1NR NAME(139)=TINT ;NAME(140)=CP NAME(141)=GEN1 ;NAME(142)=ALF NAME(143)=ETA ;NAME(144)=STRS NAME(145)=YPLS ;NAME(146)=LEN1 NAME(147)=ENUT ;NAME(148)=WCRT NAME(149)=VCRT ;NAME(150)=UCRT * 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(V1,Y,Y,N,N,N,N) SOLUTN(W1,Y,Y,N,N,N,N) SOLUTN(KE,Y,Y,N,N,N,N) SOLUTN(EP,Y,Y,N,N,N,N) SOLUTN(W1NR,Y,N,N,N,N,Y) SOLUTN(TINT,Y,N,N,N,N,Y) SOLUTN(CP,Y,N,N,N,N,Y) SOLUTN(GEN1,Y,N,N,N,N,Y) SOLUTN(ALF,Y,N,N,N,N,Y) SOLUTN(ETA,Y,N,N,N,N,Y) SOLUTN(STRS,Y,N,N,N,N,Y) SOLUTN(YPLS,Y,N,N,N,N,Y) SOLUTN(LEN1,Y,N,N,N,N,Y) SOLUTN(ENUT,Y,N,N,N,N,Y) SOLUTN(WCRT,Y,N,N,N,N,N) SOLUTN(VCRT,Y,N,N,N,N,N) SOLUTN(UCRT,Y,N,N,N,N,N) VIST = 147 LEN1 = 146 ************************************************************ 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(V1,Y,Y,Y,Y,Y,Y) TERMS(W1,Y,Y,Y,Y,Y,Y) TERMS(KE,N,Y,Y,Y,Y,N) TERMS(EP,N,Y,Y,Y,Y,N) DIFCUT =0.5 ;ZDIFAC =1. GALA = F ;ADDDIF = F NEWENT = T 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 = GRND4 TSURR =0. ;TEMP0 =0. PRESS0 =0. DVO1DT =0. ;DRH1DP =0. EMISS =0. ;SCATT =0. RADIA =0. ;RADIB =0. EL1A =0. ;EL1B =0. EL1C =0. ENUL =1.000125E-05 ;ENUT = GRND3 ENUTA =0. ;ENUTB =0. ENUTC =0. IENUTA = 1 PRNDTL(V1)=1. ;PRNDTL(W1)=1. PRNDTL(KE)=1. ;PRNDTL(EP)=1. PRT(V1)=1. ;PRT(W1)=1. PRT(KE)=0.7194 ;PRT(EP)=0.7194 CP1 =1. ;CP2 =1. ************************************************************ Group 10.Inter-Phase Transfer Processes ************************************************************ Group 11.Initial field variables (PHIs) FIINIT(P1)=1.0E-10 ;FIINIT(V1)=1.0E-10 FIINIT(W1)=26.25 ;FIINIT(KE)=1.722656 FIINIT(EP)=108.334801 ;FIINIT(W1NR)=1.0E-10 FIINIT(TINT)=1.0E-10 ;FIINIT(CP)=1.0E-10 FIINIT(GEN1)=1.0E-10 ;FIINIT(ALF)=1.0E-10 FIINIT(ETA)=1.0E-10 ;FIINIT(STRS)=1.0E-10 FIINIT(YPLS)=1.0E-10 ;FIINIT(LEN1)=1.0E-10 FIINIT(ENUT)=1.0E-10 ;FIINIT(WCRT)=1.0E-10 FIINIT(VCRT)=1.0E-10 ;FIINIT(UCRT)=1.0E-10 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(KESOURCE,PHASEM, 0, 0, 0, 0, 0, 0, 1, 1) COVAL(KESOURCE,KE , GRND4 , GRND4 ) COVAL(KESOURCE,EP , GRND4 , GRND4 ) PATCH(RNGMKE ,PHASEM, 0, 0, 0, 0, 0, 0, 1, 1) COVAL(RNGMKE ,EP , GRND4 , GRND4 ) PATCH(BFCIN ,LOW , 1, 1, 1, 25, 1, 1, 1, 1) COVAL(BFCIN ,P1 , FIXFLU , GRND1 ) COVAL(BFCIN ,V1 ,0. ,0. ) COVAL(BFCIN ,W1 ,0. , GRND1 ) COVAL(BFCIN ,KE ,0. ,1.722656 ) COVAL(BFCIN ,EP ,0. ,108.334801 ) COVAL(BFCIN ,WCRT,0. ,-26.25 ) PATCH(OUTLET ,HIGH , 1, 1, 1, 25, 80, 80, 1, 1) COVAL(OUTLET ,P1 ,1.0E+04 ,0. ) COVAL(OUTLET ,V1 ,0. ,0. ) COVAL(OUTLET ,W1 ,0. ,0. ) PATCH(WFNN ,NWALL , 1, 1, 25, 25, 1, 80, 1, 1) COVAL(WFNN ,W1 , GRND2 ,0. ) COVAL(WFNN ,KE , GRND2 , GRND2 ) COVAL(WFNN ,EP , GRND2 , GRND2 ) PATCH(WFNS ,SWALL , 1, 1, 1, 1, 1, 80, 1, 1) COVAL(WFNS ,W1 , GRND2 ,0. ) COVAL(WFNS ,KE , GRND2 , GRND2 ) COVAL(WFNS ,EP , GRND2 , GRND2 ) XCYCLE = F EGWF = T WALLCO = GRND2 BFCA =1. ************************************************************ Group 14. Downstream Pressure For PARAB ************************************************************ Group 15. Terminate Sweeps LSWEEP = 1000 ;ISWC1 = 1 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1 SELREF = T RESFAC =1.0E-04 ************************************************************ Group 16. Terminate Iterations LITER(P1)=20 ;LITER(V1)=10 LITER(W1)=10 ;LITER(KE)=20 LITER(EP)=20 ENDIT(P1)=1.0E-03 ;ENDIT(V1)=1.0E-03 ENDIT(W1)=1.0E-03 ;ENDIT(KE)=1.0E-03 ENDIT(EP)=1.0E-03 ************************************************************ Group 17. Relaxation RELAX(P1,LINRLX,1.) RELAX(V1,FALSDT,6.35E-05) RELAX(W1,FALSDT,6.35E-05) RELAX(KE,FALSDT,6.35E-05) RELAX(EP,FALSDT,6.35E-05) RELAX(W1NR,LINRLX,1.) RELAX(TINT,LINRLX,1.) RELAX(CP,LINRLX,1.) RELAX(GEN1,LINRLX,1.) RELAX(ALF,LINRLX,1.) RELAX(ETA,LINRLX,1.) RELAX(STRS,LINRLX,1.) RELAX(YPLS,LINRLX,1.) RELAX(LEN1,LINRLX,1.) RELAX(ENUT,LINRLX,1.) RELAX(WCRT,LINRLX,1.) RELAX(VCRT,LINRLX,1.) RELAX(UCRT,LINRLX,1.) KELIN = 1 OVRRLX =0. EXPERT = F ;NNORSL = F ************************************************************ Group 18. Limits VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10 VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06 VARMAX(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06 VARMAX(KE)=1.0E+10 ;VARMIN(KE)=1.0E-10 VARMAX(EP)=1.0E+10 ;VARMIN(EP)=1.0E-10 VARMAX(W1NR)=1.0E+10 ;VARMIN(W1NR)=-1.0E+10 VARMAX(TINT)=1.0E+10 ;VARMIN(TINT)=-1.0E+10 VARMAX(CP)=1.0E+10 ;VARMIN(CP)=-1.0E+10 VARMAX(GEN1)=1.0E+10 ;VARMIN(GEN1)=-1.0E+10 VARMAX(ALF)=1.0E+10 ;VARMIN(ALF)=-1.0E+10 VARMAX(ETA)=1.0E+10 ;VARMIN(ETA)=-1.0E+10 VARMAX(STRS)=1.0E+10 ;VARMIN(STRS)=-1.0E+10 VARMAX(YPLS)=1.0E+10 ;VARMIN(YPLS)=-1.0E+10 VARMAX(LEN1)=1.0E+10 ;VARMIN(LEN1)=-1.0E+10 VARMAX(ENUT)=1.0E+10 ;VARMIN(ENUT)=-1.0E+10 VARMAX(WCRT)=1.0E+10 ;VARMIN(WCRT)=-1.0E+10 VARMAX(VCRT)=1.0E+10 ;VARMIN(VCRT)=-1.0E+10 VARMAX(UCRT)=1.0E+10 ;VARMIN(UCRT)=-1.0E+10 ************************************************************ Group 19. Data transmitted to GROUND GENK = T PARSOL = F IENUTA = 1 ISG62 = 1 SPEDAT(SET,STORED,CP,C,=2.*P1/(RHO1*26.25*26.25)!ZSLFIN) SPEDAT(SET,STORED,TINT,C,=KE^0.5/26.25!ZSLFIN) SPEDAT(SET,STORED,W1NR,C,=W1/26.25!ZSLFIN) SPEDAT(SET,OUTPUT,NOFIELD,L,T) SPEDAT(SET,GXMONI,PLOTALL,L,T) ************************************************************ Group 20. Preliminary Printout DISTIL = T ;NULLPR = F NDST = 0 DSTTOL =1.0E-02 EX(P1)=121.800003 ;EX(V1)=0.6161 EX(W1)=25.049999 ;EX(KE)=4.14 EX(EP)=7562. ;EX(W1NR)=0.9425 EX(TINT)=0.07357 ;EX(CP)=0.3536 EX(GEN1)=1.497E+08 ;EX(ALF)=0.6735 EX(ETA)=3.073 ;EX(STRS)=0.1539 EX(YPLS)=1.338 ;EX(LEN1)=1.178E-03 EX(ENUT)=1.076E-03 ;EX(WCRT)=21.42 EX(VCRT)=6.76 ;EX(UCRT)=0. ************************************************************ 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) OUTPUT(V1,Y,N,Y,Y,Y,Y) OUTPUT(W1,Y,N,Y,Y,Y,Y) OUTPUT(KE,Y,N,Y,Y,Y,Y) OUTPUT(EP,Y,N,Y,Y,Y,Y) OUTPUT(W1NR,Y,N,Y,N,N,N) OUTPUT(TINT,Y,N,Y,N,N,N) OUTPUT(CP,Y,N,Y,N,N,N) OUTPUT(GEN1,Y,N,Y,N,N,N) OUTPUT(ALF,Y,N,Y,Y,Y,Y) OUTPUT(ETA,Y,N,Y,Y,Y,Y) OUTPUT(STRS,Y,N,Y,N,N,N) OUTPUT(YPLS,Y,N,Y,N,N,N) OUTPUT(LEN1,Y,N,Y,N,N,N) OUTPUT(ENUT,Y,N,Y,N,Y,Y) OUTPUT(WCRT,Y,N,Y,N,N,N) OUTPUT(VCRT,Y,N,Y,N,N,N) OUTPUT(UCRT,Y,N,Y,N,N,N) ************************************************************ Group 22. Monitor Print-Out IXMON = 1 ;IYMON = 2 ;IZMON = 56 NPRMON = 1000 ;NPRMNT = 1 ;TSTSWP = -1 UWATCH = T ;USTEER = T HIGHLO = F ************************************************************ Group 23.Field Print-Out & Plot Control NPRINT = 1000 ;NUMCLS = 5 NYPRIN = 1 ;IYPRF = 1 ;IYPRL = 10000 NZPRIN = 1 ;IZPRF = 18 ;IZPRL = 24 XZPR = F ;YZPR = F IPLTF = 1 ;IPLTL = -1 ;NPLT = 2 ISWPRF = 1 ;ISWPRL = 100000 ITABL = 3 ;IPROF = 1 ABSIZ =0.5 ;ORSIZ =0.4 NTZPRF = 1 ;NCOLPF = 50 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20 No PATCHes yet used for this Group ************************************************************ Group 24. Dumps For Restarts SAVE = T ;NOWIPE = F NSAVE =CHAM STOP