FD_TO_TEC
Convert an FEM Model to a TECPLOT ASCII File

FD_TO_TEC 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 TECPLOT.

The finite difference model is assumed to include two items:

• Node coordinates, stored in a "node file";
• Node values, such as pressure, velocity, and so on, stored in a "value file";

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".

FD_TO_TEC reads these two files, calls MATLAB's delaunayn 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.

The TECPLOT home page contains a description of the TECPLOT program.

Usage:

fd_to_tec ( 'prefix' )

• 'prefix' is the common file prefix;

Licensing:

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

Related Data and Programs:

FD, a data directory which contains examples of FD files, two text files that can be used to describe many finite difference models;

FEM_TO_TEC, a MATLAB program which converts FEM models into TECPLOT ASCII graphics files.

TEC, a data directory which contains a description and examples of TECPLOT ASCII graphics files.

TEC_IO, a MATLAB library which reads and writes TECPLOT ASCII graphics files.

Source Code:

• fd_to_tec.m the source code.

Examples and Tests:

ELL is an example of a 2D finite difference model in which a scalar value is stored.

• ell_nodes.txt the nodal coordinates.
• ell_values.txt, the nodal values.
• ell_elements.txt, an element file, created by the program.
• ell.dat, the TECPLOT ASCII file.

CARLOS is an example of a 3D finite difference model in which a scalar value is stored.

• carlos_nodes.txt
• carlos_values.txt
• carlos_elements.txt, an element file, created by the program.
• carlos.dat, the TECPLOT ASCII file.

You can go up one level to the MATLAB source codes.