Civil Engineering Reference
In-Depth Information
One more layer
of cells added
Circle exceeds
upper edge
Boundary
triangles
Zone I
Original zone
Augmented zone
Figure 7.6
Augmented zone with additional columns and rows of cells.
the augmented zonal boundary depicted by the dotted line in Figure 7.6, except that two
or three circles exceed the top edge; with one more row of cells added on the top edge as
depicted by the dotted line in the rectangular region, all the circumcircles are now bounded.
However, for the concurrent point insertion of a corner zone, as shown in Figure 7.7,
no additional column of cells is added to the left of the zone as the boundary of the global
domain has already been reached (i.e. column 1 has already been inserted to the zone), and
no row of cells is added to the bottom edge either. Similarly, in the concurrent insertion of a
zone at the bottom boundary of the global domain, as shown in Figure 7.8, there is no need
to add one more row of cells at the bottom edge as we have already arrived at the bottom
(i.e. row 1 has already been included to the zone).
Layers of cells added
Figure 7.7
Concurrent insertion at a corner zone.
