Page 221 - Basic Structured Grid Generation

210 Basic Structured Grid Generation

• active nodes: 1, 9, 2, 10, 3, 4, 5, 6, 7, 8
• active sides: 1-9, 9-2, 2-10, 10-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-1
• passive nodes: none
• passive sides 1-2, 2-3
• npoint: 10
• nelem: 2
• nptr: 10

In the next step the chosen face is 10-3 (Fig. 8.28), but now K ideal does not lie in
the interior of the domain, and the equilateral triangle produced is not valid. Thus the
ideal point is not acceptable. Instead, we use the existing active node 4, and take 10-4
as a new active side. The updated front (Fig. 8.29) has properties as follows:

• active nodes: 1, 9, 2, 10, 4, 5, 6, 7, 8
• active sides: 1-9, 9-2, 2-10, 10-4, 4-5, 5-6, 6-7, 7-8, 8-1
• passive nodes: 3

5
6 4
K id
10

7 2 3
9
2
1

8
1
Fig. 8.28 Side 3-10; ideal point.

5
6 4

10 3

7 2 3
9
2
1

8
1
Fig. 8.29 Fourth front.