I'm learning about BFC,,but I'm having problems with multi-blocking. We have Phoenics 2.2..When I use MPATCH and READCO and reload the q1,,the geometry looks good in the menu...but when I return to the main menu to apply boundaries...the geometry becomes distorted and scattered that its hard to make the boundaries...Please help........

It would be helpful if you would post the Q1 file you are using. How have you prepared the multi-block grid? Have you used a grid generation tool or have you done that in PIL? For up-to-date multi-block grid generation there is no way around external meshing tools.

regards

Volker

Thanks....I was doing this tutorial about a T-duct,,,connecting 2 blocks by extending a dummy cell..and using MPATCH and READCO to combine them..So..I probably modified some of q1 not using any grid generation tool except satellite.

Here is the q1 file....

TALK=T;RUN( 1, 1);VDU=VGAMOUSE ************************************************** **********

Q1 created by GENERAL menu, Version 2.2, Date 17/09/96 CHAR(CPVNAM);CPVNAM=GENERAL ************************************************** ********** IRUNN = 1 ;LIBREF = 0 ************************************************** ********** Group 1. Run Title TEXT(No title has been set for this run. ) ************************************************** ********** Group 2. Transience STEADY = T ************************************************** ********** Groups 3, 4, 5 Grid Information

* Overall number of cells, RSET(M,NX,NY,NZ,tolerance) RSET(M,21,16,1)

* Set overall domain extent:

* xulast yvlast zwlast name XSI= 1.000E+00;YSI= 1.000E+00;ZSI= 1.000E+00;RSET(D,CHAM ) ************************************************** ********** Group 6. Body-Fitted coordinates BFC=T READCO(gri2)

********** NONORT = T NUMBLK = 2

* X-cyclic boundaries switched ************************************************** ********** Group 7. Variables: STOREd,SOLVEd,NAMEd ONEPHS = T

* Non-default variable names NAME( 49) =DEN1 ; NAME( 50) =PRPS STORE(PRPS,DEN1)

************************************************** ********** Group 8. Terms & Devices NEWRH1 = T ************************************************** ********** Group 9. Properties RHO1 = GRND10 CP1 = 1.005E+03 ENUL = 1.000E-05 ;ENUT = 0.000E+00 ************************************************** ********** Group 10.Inter-Phase Transfer Processes ************************************************** ********** Group 11.Initialise Var/Porosity Fields FIINIT(PRPS) = 0.000E+00

No PATCHes used for this Group

INIADD = T ************************************************** ********** Group 12. Convection and diffusion adjustments

No PATCHes used for this Group ************************************************** ********** Group 13. Boundary & Special Sources

PATCH (MBD1 ,CELL ,1,5,1,16,1,1,#1,#1)

PATCH (MBD2 ,CELL ,7,21,1,6,1,1,#1,#1)

PATCH (MBL1-2 ,NORTH ,1,5,16,16,1,1,#1,#1)

PATCH (MBL2-1 ,SOUTH ,12,16,2,2,1,1,#1,#1)

EGWF = T ************************************************** ********** Group 14. Downstream Pressure For PARAB ************************************************** ********** Group 15. Terminate Sweeps LSWEEP = 1 SELREF = T RESFAC = 1.000E-03 ************************************************** ********** Group 16. Terminate Iterations ************************************************** ********** Group 17. Relaxation ************************************************** ********** Group 18. Limits ************************************************** ********** Group 19. EARTH Calls To GROUND Station ************************************************** ********** Group 20. Preliminary Printout ECHO = T ************************************************** ********** Group 21. Print-out of Variables ************************************************** ********** Group 22. Monitor Print-Out IXMON = 10 ;IYMON = 8 ;IZMON = 1 NPRMNT = 1 TSTSWP = -1 ************************************************** ********** Group 23.Field Print-Out & Plot Control

No PATCHes used for this Group ************************************************** ********** Group 24. Dumps For Restarts ************************************************** ********** MENSAV(S,RELX,DEF,4.7619E-02,1.0000E-05,0) MENSAV(S,PHSPROP,DEF,200,0,1.1890E+00,1.0000E-05) MENSAV(S,FLPRP,DEF,LAMINAR,NOTSET,AIR-CONSTANT) M STOP