! GMANPRE - Version 6.100 (last changed 1997/08/07 20:47:48)
!
! Read in the Common Grid File.  You can convert a PLOT3D file to a
! Common Grid File using cfcnvt.
 FILE demo.cgd
!
! Select Zone 1 - Airfoil Grid
 ZONE 1
!
! Select the overlap boundary type - This type is useful for setting up
! Chimera grids and for setting boundary conditions on interior grid
! points.  For this case, Zone 2 (Flap grid) is embedded in zone 1.
   BOUNDARY OLAP
!
! Use a surface from another grid to cut a hole for Chimera
     CUTTER SURFACE TYPE
!
! Choose the surfaces in zone 2 that will define the hole.
    CUTTER SURFACE IN ZONE 2  I20 J26 K1 TO I160 J26 K1 INCREMENT 1
    CUTTER SURFACE IN ZONE 2  I20 J1 K1 TO I20 J26 K1 INCREMENT 1
    CUTTER SURFACE IN ZONE 2  I160 J1 K1 TO I160 J26 K1 INCREMENT 1
!
! Set a label number - Must be greater than 6.
 LABEL 7
!
! Generate the Hole
    GENERATE HOLE
!
! Now define the "fringe" - Use the previously defined hole to define
! the fringe.  Other options allow you to define a fringe as the outer
! surfaces of a grid block.  This is useful if two blocks overlap
! but cutting a hole is not necessary, or for the embedded grid as
! demonstrated below.
    FRINGE-MODE HOLE
    GENERATE FRINGE
!
! Now set the boundary condition on the fringe.  You can set any BC.
! For this case we are coupling to zone 2.
    SET FRINGE BOUNDARY COUPLED TO ZONE 2 BOUNDARY OLAP
     UPDATE
!
! Now go to zone 2 (flap grid) to set the overlap boundary conditions.
 ZONE 2
   BOUNDARY OLAP
!
! Since this grid is completed embedded in zone 1 and the outer
! boundaries do not overlap any solid boundaries, cutting a hole is not
! necessary, and we can use the outer boundaries to define the fringe.
    FRINGE-MODE OUTER BOUNDARY  ON I1
    FRINGE-MODE OUTER BOUNDARY  ON IMAX
    FRINGE-MODE OUTER BOUNDARY  ON JMAX
!
! Use another label to uniquely define this fringe.
 LABEL 8
    GENERATE FRINGE
!
! Couple this fringe to zone 1.  We could set any BC as described above.
    SET FRINGE BOUNDARY COUPLED TO ZONE 1 BOUNDARY OLAP
     UPDATE
!
! Now go back to zone 1 to finish setting BCs.
 ZONE 1
!
! Boundaries I1 (I=1) and IMAX (I=IMAX) are outflow boundaries of the C 
! grid surrounding the airfoil.
   BOUNDARY I1
     CONFINED OUTFLOW
     UPDATE
   BOUNDARY IMAX
     CONFINED OUTFLOW
     UPDATE
!
! Boundary JMAX (J=JMAX) is the outer boundary of the airflow and should
! be set to freestream conditions (INFLOW OUTFLOW).
   BOUNDARY JMAX
     INFLOW OUTFLOW
     UPDATE
!
! Boundary J1 (J=1) is the airfoil and the C-grid cut line.  First
! couple the grid to itself.  The remaining UNDEFINED points will be the
! airfoil.  Set them to viscous wall.
   BOUNDARY J1
     CPMODE POINT MATCH
     COUPLED TO ZONE 1 BOUNDARY J1
     UNDEFINED IS VISCOUS WALL
     UPDATE
!
! Now finish the BCs in zone 2 (flap grid).
 ZONE 2
!
! The outer and downstream boundaries have been coupled to zone 1
! already, so the J1 boundary is the only one remaining.  Do this the
! same way as the Zone 1 J1 boundary was done.
   BOUNDARY J1
     COUPLED TO ZONE 2 BOUNDARY J1
     UNDEFINED IS VISCOUS WALL
     UPDATE
!
! OK.  You're done.  Now check the boundary conditions to be sure
! everything is defined.
 ZONE ALL
 CHECK BOUNDARY