forked from johannesgerer/jburkardt-cpp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
fem2d_poisson_sparse_ell.html
141 lines (119 loc) · 4.05 KB
/
fem2d_poisson_sparse_ell.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
<html>
<head>
<title>
FEM2D_POISSON_SPARSE_ELL - A 2D Poisson Problem in an L-shaped Region
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
FEM2D_POISSON_SPARSE_ELL <br> A 2D Poisson Problem in an L-shaped Region
</h1>
<hr>
<p>
<b>FEM2D_POISSON_SPARSE_ELL</b> is a C++ library which
sets up the geometry and data for a Poisson problem in an L-shaped region
for solution by FEM2D_POISSON_SPARSE.
</p>
<p>
This mesh, which uses 65 nodes, was created by starting with
a crude mesh, and having it refined by TRIANGULATION_REFINE and renumbered by
TRIANGULATION_RCM.
</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">
Languages:
</h3>
<p>
<b>FEM2D_POISSON_SPARSE_ELL</b> is available in
<a href = "../../cpp_src/fem2d_poisson_sparse_ell/fem2d_poisson_sparse_ell.html">a C++ version</a> and
<a href = "../../f_src/fem2d_poisson_sparse_ell/fem2d_poisson_sparse_ell.html">a FORTRAN90 version</a> and
<a href = "../../m_src/fem2d_poisson_sparse_ell/fem2d_poisson_sparse_ell.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/fem2d_poisson_sparse/fem2d_poisson_sparse.html">
FEM2D_POISSON_SPARSE</a>,
a C++ program which
solves a 2D Poisson problem, using a sparse matrix solver, and user input.
</p>
<p>
<a href = "../../cpp_src/fem2d_poisson_sparse_baffle/fem2d_poisson_sparse_baffle.html">
FEM2D_POISSON_SPARSE_BAFFLE</a>,
a C++ library which
defines the geometry of a rectangle channel containing 13 hexagonal baffles,
as well as boundary conditions for a given Poisson problem, and is called by
fem2d_poisson_sparse as part of a solution procedure.
</p>
<p>
<a href = "../../cpp_src/fem2d_poisson_sparse_lake/fem2d_poisson_sparse_lake.html">
FEM2D_POISSON_SPARSE_LAKE</a>,
a C++ library which
defines the geometry of a lake-shaped region, as well as boundary
conditions for a given Poisson problem, and is called by
<b>fem2d_poisson_sparse</b> as part of a solution procedure.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "ell.cpp">ell.cpp</a>,
the user-supplied routines to evaluate the right hand side,
linear coefficient, and boundary conditions;
</li>
<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>,
output from a run of the program;
</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>
<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 = "../cpp_src.html">
the C++ source code page</a>.
</p>
<hr>
<i>
Last revised on 06 December 2010.
</i>
<!-- John Burkardt -->
</body>
</html>