TALK=T;RUN(1,1) DISPLAY This case concerns plane, 2d incompressible flow through a 180 degree turnaround duct. The flow exhibits large streamline curvature together with flow separation near the bend exit next to the inner surface of the duct. Calculations are made with the low-Re k-e model of Lam and Bremhorst. Consequently, the numerical integration is taken down to the wall. The calculations employ a non-uniform mesh of NY=60 and NZ=80, for which the solution is not as yet grid independent. The calculation may also be performed with the modified low-Re k-e model of Chen and Kim [1987,1990]. The fine-mesh calculation employs a relatively coarse non-uniform mesh of NY=60 by NZ=80 which concentrates grid cells close to the wall. About 2000 sweeps are required for a converged solution with this mesh. However, for speed of computation the calculation is performed on a coarse mesh of NY=20 by NZ=40. Consequently, the solution is unlikely to be of sufficient quality because most of the near-wall cells are located too far from the wall for laminar conditions to apply on KE and EP. PHOENICS will actually activate log-law wall functions for velocities if the near-wall point lies outside the viscous sublayer. For demonstration purposes the calculation is set up for 20 sweeps, but 200 sweeps are required for complete convergence. 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 w velocity resolutes con w1 x 1 fi;0.1 msg press to continue pause con del; redr msg contours of turbulence energy con ke x 1 fi;0.1 msg Press and then to END pause ENDUSE ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(LAM-BRE K-E TURB. FLOW IN U-DUCT :T214) ************************************************************ ************************************************************ IRUNN = 1 ;LIBREF = 14 ************************************************************ 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 = 20 YVLAST =0.0381 ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 40 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, 21, 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 = 11 ;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(144)=LEN1 NAME(145)=ENUT ;NAME(146)=LTLS NAME(147)=WDIS ;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,Y) SOLUTN(W1,Y,Y,N,N,N,Y) SOLUTN(KE,Y,Y,N,N,N,N) SOLUTN(EP,Y,Y,N,N,N,N) SOLUTN(LEN1,Y,N,N,N,N,Y) SOLUTN(ENUT,Y,N,N,N,N,Y) SOLUTN(LTLS,Y,Y,Y,N,N,Y) SOLUTN(WDIS,Y,N,N,N,N,N) 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 = 145 LEN1 = 144 ************************************************************ 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) TERMS(LTLS,N,N,Y,N,Y,Y) 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 = 3 PRNDTL(V1)=1. ;PRNDTL(W1)=1. PRNDTL(KE)=1. ;PRNDTL(EP)=1. PRNDTL(LTLS)=1. PRT(V1)=1. ;PRT(W1)=1. PRT(KE)=1. ;PRT(EP)=1.314 PRT(LTLS)=1. 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(LEN1)=1.0E-10 FIINIT(ENUT)=1.0E-10 ;FIINIT(LTLS)=1.0E-10 FIINIT(WDIS)=3.81E-03 ;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(BFCIN ,LOW , 1, 1, 1, 20, 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, 20, 40, 40, 1, 1) COVAL(OUTLET ,P1 ,1.0E+04 ,0. ) COVAL(OUTLET ,V1 ,0. ,0. ) COVAL(OUTLET ,W1 ,0. ,0. ) PATCH(WFNN ,NWALL , 1, 1, 20, 20, 1, 40, 1, 1) COVAL(WFNN ,W1 , GRND2 ,0. ) COVAL(WFNN ,KE ,1. ,0. ) PATCH(WFNS ,SWALL , 1, 1, 1, 1, 1, 40, 1, 1) COVAL(WFNS ,W1 , GRND2 ,0. ) COVAL(WFNS ,KE ,1. ,0. ) XCYCLE = F EGWF = T WALLCO = GRND2 BFCA =1. ************************************************************ 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-04 ************************************************************ Group 16. Terminate Iterations LITER(P1)=10 ;LITER(V1)=10 LITER(W1)=10 ;LITER(KE)=20 LITER(EP)=20 ;LITER(LTLS)=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 ;ENDIT(LTLS)=1.0E-03 ************************************************************ Group 17. Relaxation RELAX(P1,LINRLX,0.5) RELAX(V1,FALSDT,1.27E-03) RELAX(W1,FALSDT,1.27E-03) RELAX(KE,FALSDT,1.27E-03) RELAX(EP,FALSDT,1.27E-03) RELAX(LEN1,LINRLX,1.) RELAX(ENUT,LINRLX,1.) RELAX(LTLS,FALSDT,1.0E+09) RELAX(WDIS,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(LEN1)=1.0E+10 ;VARMIN(LEN1)=-1.0E+10 VARMAX(ENUT)=1.0E+10 ;VARMIN(ENUT)=-1.0E+10 VARMAX(LTLS)=1.0E+10 ;VARMIN(LTLS)=-1.0E+10 VARMAX(WDIS)=1.0E+10 ;VARMIN(WDIS)=-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 YPLS = T PARSOL = F IENUTA = 3 ISG62 = 1 ************************************************************ 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) 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(LEN1,Y,N,Y,N,N,N) OUTPUT(ENUT,Y,N,Y,N,N,N) OUTPUT(LTLS,Y,N,Y,Y,Y,Y) OUTPUT(WDIS,Y,N,N,N,N,N) 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 = 20 NPRMON = 20 ;NPRMNT = 1 ;TSTSWP = -1 UWATCH = T ;USTEER = T HIGHLO = F ************************************************************ Group 23.Field Print-Out & Plot Control NPRINT = 20 ;NUMCLS = 5 NYPRIN = 2 ;IYPRF = 1 ;IYPRL = 10000 NZPRIN = 10 ;IZPRF = 1 ;IZPRL = 10000 XZPR = F ;YZPR = F IPLTF = 1 ;IPLTL = -1 ;NPLT = 10 ISWPRF = 1 ;ISWPRL = 100000 ITABL = 2 ;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