poisson_square

poisson_square, a FreeFem++ code which solves the steady Poisson equation in a square.

The exact solution is known, so we can compare the FEM result with it.

Licensing:

The computer code and data files described and made available on this web page are distributed under the MIT license

Reference:

1. John Chrispell, Jason Howell,
   Finite Element Approximation of Partial Differential Equations Using FreeFem++, or, How I Learned to Stop Worrying and Love Numerical Analysis.
2. Frederic Hecht,
   New development in FreeFem++,
   Journal of Numerical Mathematics,
   Volume 20, Number 3-4, 2012, pages 251-265.

Source Code:

• poisson_square.edp, the script.
• poisson_square.sh, runs all the tests.
• poisson_square.txt, the output file.

• poisson_square_fem.png, a contour plot of the FEM solution.
• poisson_square_exact.png, a contour plot of the exact solution.