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fem2d_poisson_sparse_ell.html
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<html>
<head>
<title>
FEM2D_POISSON_SPARSE_ELL - A Problem in an L-shaped Region for FEM2D_POISSON_SPARSE
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
FEM2D_POISSON_SPARSE_ELL <br>
A Problem in an L-shaped Region <br>
for FEM2D_POISSON_SPARSE
</h1>
<hr>
<p>
<b>FEM2D_POISSON_SPARSE_ELL</b>
is a FORTRAN90 library which
defines the geometry of an L-shaped region, as well as boundary
conditions for a given Poisson problem, and is called by FEM2D_POISSON_SPARSE
as part of a solution procedure.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this
web page are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../f_src/fem2d_poisson_sparse/fem2d_poisson_sparse.html">
FEM2D_POISSON_SPARSE</a>,
a FORTRAN90 program which
solves Poisson's equation on a triangulated region,
using the finite element method.
</p>
<p>
<a href = "../../f_src/fem2d_poisson_sparse_lake/fem2d_poisson_sparse_lake.html">
FEM2D_POISSON_SPARSE_LAKE</a>,
a FORTRAN90 library which
defines the geometry of a lake-shaped region, as well as boundary
conditions for a given Poisson problem, and is called by FEM2D_POISSON_SPARSE
as part of a solution procedure.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Hans Rudolf Schwarz,<br>
Methode der Finiten Elemente,<br>
Teubner Studienbuecher, 1980,<br>
ISBN: 3-519-02349-0.
</li>
<li>
Gilbert Strang, George Fix,<br>
An Analysis of the Finite Element Method,<br>
Cambridge, 1973,<br>
ISBN: 096140888X,<br>
LC: TA335.S77.
</li>
<li>
Olgierd Zienkiewicz,<br>
The Finite Element Method,<br>
Sixth Edition,<br>
Butterworth-Heinemann, 2005,<br>
ISBN: 0750663200.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "ell.f90">ell.f90</a>,
the user-supplied routines to evaluate the right hand side,
linear coefficient, and boundary conditions;
</li>
<li>
<a href = "ell_nodes.txt">ell_nodes.txt</a>,
a text file containing a list, for each node, of its X and Y
coordinates;
</li>
<li>
<a href = "ell_nodes.png">ell_nodes.png</a>,
a PNG image of
the nodes;
</li>
<li>
<a href = "ell_elements.txt">ell_elements.txt</a>,
a text file containing a list, for each element, of the three
nodes that compose it;
</li>
<li>
<a href = "ell_elements.png">ell_elements.png</a>,
a PNG image of
the element mesh;
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "ell.sh">ell.sh</a>,
commands to compile the user routines, link them with
the partial program, and run the program;
</li>
<li>
<a href = "ell_output.txt">ell_output.txt</a>,
the output file;
</li>
<li>
<a href = "ell_solution.txt">ell_solution.txt</a>,
a text file containing the solution U at each node (X,Y);
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 02 January 2011.
</i>
<!-- John Burkardt -->
</body>
</html>