SAMPLE - A small sample problem

The SAMPLE problem is described in the paper, and involves just a few nodes, with a mixture of 3 and 4 node elements, and both Dirichlet and Neumann boundary conditions.

Files you may copy include:

• coordinates.dat, the spatial coordinates of the nodes.
• dirichlet.dat, the edges of the region along which Dirichlet boundary conditions are specified. Edges are denoted by pairs of nodes, and the nodes should be listed in their counterclockwise order around the region.
• elements3.dat, defines the triangular elements by listing the indices of their vertices. The vertices should be listed in counterclockwise order.
• elements4.dat, defines the quadrilateral elements by listing the indices of their vertices. The vertices should be listed in counterclockwise order.
• neumann.dat, the edges of the region along which Neumann boundary conditions are specified. Edges are denoted by pairs of nodes, and the nodes should be listed in their counterclockwise order around the region.
• f.m, evaluates the right hand side of Laplace's equation.
• g.m, evaluates the Neumann boundary conditions.
• u_d.m, evaluates the Dirichlet boundary conditions.
• sample.jpg, a JPEG image of the 3D graphical output.