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<html>
<head>
<title>
FD_TO_TEC - Convert an FD Model to a TECPLOT ASCII File
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
FD_TO_TEC <br> Convert an FEM Model to a TECPLOT ASCII File
</h1>
<hr>
<p>
<b>FD_TO_TEC</b>
is a MATLAB program which
reads two files
defining a finite difference model (FD format) and writes a
TECPLOT ASCII file suitable for display by <b>TECPLOT</b>.
</p>
<p>
The finite difference model is assumed to include two items:
<ul>
<li>
Node coordinates, stored in a "node file";
</li>
<li>
Node values, such as pressure,
velocity, and so on, stored in a "value file";
</li>
</ul>
</p>
<p>
A naming convention assumes that these files share a common prefix,
followed by the suffixes "_nodes.txt" and "_values.txt".
Thus, the "carlos" set of data would be contained in the files
"carlos_nodes.txt" and "carlos_values.txt".
</p>
<p>
<b>FD_TO_TEC</b> reads these two files, calls MATLAB's <b>delaunayn</b> function
to get a triangularization (if the node data is 2D)
or a tetrahedralization (if the node data is 3D) and writes the element data
to a file (which turns the FD model into an FEM model), and writes an equivalent
TECPLOT ASCII ".dat" file.
</p>
<p>
<a href = "http://www.tecplot.com/">
The TECPLOT home page</a> contains a description of the
<b>TECPLOT</b> program.
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
<b>fd_to_tec</b> ( <i>'prefix'</i> )
</blockquote>
where
<ul>
<li>
<i>'prefix'</i> is the common file prefix;
</li>
</ul>
reads the files <i>'prefix'</i>_nodes.txt,
and <i>'prefix'</i>_values.txt; creates an element file <i>'prefix'</i>_elements.txt,
and creates the TECPLOT ASCII file <i>'prefix'</i>.dat.
</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>FD_TO_TEC</b> is available in
<a href = "../../m_src/fd_to_tec/fd_to_tec.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../data/fd/fd.html">
FD</a>,
a data directory which
contains examples of FD files, two text files that can be used to describe
many finite difference models;
</p>
<p>
<a href = "../../m_src/fem_to_tec/fem_to_tec.html">
FEM_TO_TEC</a>,
a MATLAB program which
converts FEM models into TECPLOT ASCII graphics files.
</p>
<p>
<a href = "../../data/tec/tec.html">
TEC</a>,
a data directory which
contains a description and examples
of TECPLOT ASCII graphics files.
</p>
<p>
<a href = "../../m_src/tec_io/tec_io.html">
TEC_IO</a>,
a MATLAB library which
reads and writes TECPLOT ASCII graphics files.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "fd_to_tec.m">fd_to_tec.m</a>
the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<b>ELL</b> is an example of a 2D finite difference model
in which a scalar value is stored.
<ul>
<li>
<a href = "ell_nodes.txt">ell_nodes.txt</a>
the nodal coordinates.
</li>
<li>
<a href = "ell_values.txt">ell_values.txt</a>,
the nodal values.
</li>
<li>
<a href = "ell_elements.txt">ell_elements.txt</a>,
an element file, created by the program.
</li>
<li>
<a href = "ell.dat">ell.dat</a>, the TECPLOT ASCII file.
</li>
</ul>
</p>
<p>
<b>CARLOS</b> is an example of a 3D finite difference model
in which a scalar value is stored.
<ul>
<li>
<a href = "carlos_nodes.txt">carlos_nodes.txt</a>
</li>
<li>
<a href = "carlos_values.txt">carlos_values.txt</a>
</li>
<li>
<a href = "carlos_elements.txt">carlos_elements.txt</a>,
an element file, created by the program.
</li>
<li>
<a href = "carlos.dat">carlos.dat</a>, the TECPLOT ASCII file.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 12 March 2010.
</i>
<!-- John Burkardt -->
</body>
</html>