Page 279 - Introduction to Computational Fluid Dynamics

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ENLARGED VIEW NUMERICAL GRID GENERATION

Figure 8.17. Flow over a multielement airfoil.

note that cells identified by filled circles, though rectangular, may have more
than four neighboring cells.
(a) Identify the number of neighbouring cells for the two cells marked with
filled circles.
(b) Examine whether the discretisation procedure described in Chapter 6 can
be employed for such a mesh.
11. It is desired to generate an essentially quadrilateral unstructured mesh for the
moon-shaped duct shown in Figure 6.35.The duct shape, however, is such that in
some portions of the duct the elements must be triangular to avoid unnecessary
concentration of nodes. Write a computer program to generate such a mixed-
element grid and generate vertex and element files.