For the airfoil of Prob. 15–16, sketch a coarse hybrid grid and explain the advantages of such a grid.

Data from Problem 15-16.

A CFD code is used to simulate flow over a two dimensional airfoil at an angle of attack. A portion of the computational domain near the airfoil is outlined in Fig. P15–16 (the computational domain extends well beyond the region outlined by the dashed line). Sketch a coarse structured grid using four-sided cells and sketch a coarse unstructured grid using three-sided cells in the region shown. Be sure to cluster the cells where appropriate. Discuss the advantages and disadvantages of each grid type.

FIGURE P15–16

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