2.3  Two dimensional Boundaries

In the subroutine that solve Laplace problems in two dimensions ( LIBEM2) the boundaries must be represented in the form illustrated in the figure below. In order that the normal to the boundary points outward rather than inward, the two nodes that define each element must be listed in the clockwise direction around the boundary. The program LIBEM2_T solves Laplace problems in which the boundary under consideration is that of a square of side 0.1. The boundary is represented by 32 uniform panels and also has 32 vertices, as illustrated in the squae figure below.

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