2D Advancing Front Unstructured Grid Generation

Investigators: Sanjay R. Mathur, R.G. Rajagopalan

Sponsored by : AEEM Department @ ISU & NASA Ames Research Center

Summary

A 2D unstructured grid generator is developed using the advancing front method. The figures below show part of the graphic user interface as the unstructured grid is been developed over NACA0012 airfoil.

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Figure 1: Initial points distribution on the domain boundaries. The edges of the boundaries form the initial front.

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Figure 2: Here the front has been advanced outward from the surface of the airfoil. The advancing fron is shown as in red color while constructed cells are shown in white color. The green edges are the active edge on which a cell will be constructed once a proposed point is found. The proposed point is shown in the figure in yellow.

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Figure 3: The complete triangulation of the domain. Note the abrupt changes in triangles in certain region of the grid.

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Figure 4: The final domain decomposition after three smoothing passes to a void the abrupt changes in cell areas as show in the previous figure.