LAKE
A Lake Problem for FREE_FEM_POISSON

The LAKE problem uses the geometry of a simulated lake with an island. This is an example of how to specify a problem to be solved by FREE_FEM_POISSON.

• dirichlet_condition.m, defines the Dirichlet boundary condition values.
• k_coef.m, defines the coefficient function K(X).
• rhs.m, defines the right hand side function.
• lake_output.txt, output from a run of the program;
• lake_nodes.txt, a text file containing a list, for each node, of its X and Y coordinates;
• lake_nodes.png, a PNG image of the nodes;
• lake_triangles.txt, a text file containing a list, for each element, of the three nodes that compose it;
• lake_triangles.png, a PNG image of the element mesh;
• lake_solution.txt, a text file containing the solution U at each node (X,Y);

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