FEM_TO_TEC
Convert an FEM Model to a TEC Graphics File

FEM_TO_TEC is a MATLAB program which reads three files defining a finite element model (FEM format) and writes a TEC graphics file suitable for display by TECPLOT.

The finite element model is assumed to include three items:

• Node coordinates, stored in a "node coordinate file";
• Elements defined by a sequence of node indices, store in an "element file";
• Node data, such as finite element coefficients for pressure, velocity, and so on, stored in a "node data file";

FEM_TO_TEC reads these three files and writes an equivalent TEC file that can be processed by the TECPLOT graphics program.

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

Usage:

fem_to_tec ( 'node_file', 'element_file', 'solution_file', 'tec_file' )

reads the FEM data in node_file, element_file and solution_file and writes the data to a TECPLOT file tec_file.

Related Data and Programs:

FEM is a data directory which contains a description of the data files that can be used to describe a finite element model.

FEM_50 is a MATLAB finite element program in just 50 lines of code.

FEM_50_HEAT is a modified version of FEM_50 suitable for solving the heat equation.

FEM_IO is a library of MATLAB routines for reading or writing an FEM model.

FEM_SAMPLE is a MATLAB library of routines for evaluating a finite element function defined on an order 3 or order 6 triangulation.

FEM_TO_TEC is also available in a FORTRAN90 version.

FEM2D_HEAT is a MATLAB program that solves the time dependent heat equation in the unit square.

FEM2D_POISSON is a MATLAB program for solving Poisson's equation on a square, using the finite element method.

FEMPACK is a MATLAB library of routines for finite element calculations.

FREE_FEM_HEAT is a MATLAB program that solves the time dependent heat equation in an arbitrary triangulated 2D region.

FREE_FEM_NAVIER_STOKES is a MATLAB program for solving the steady incompressible Navier Stokes equations on an arbitrary triangulated region, using the finite element method.

FREE_FEM_POISSON is a MATLAB program for solving Poisson's equation on a triangulated region, using the finite element method.

FREE_FEM_STOKES is a MATLAB program for solving the Stokes equations on a triangulated region, using the finite element method.

HOT_PIPE is a sample problem that can be run with FEM_50_HEAT.

HOT_POINT is a sample problem that can be run with FEM_50_HEAT.

PLTMG_SINGLE is a FORTRAN77 library of routines for solving elliptic partial differential equations using the finite element method with piecewise linear triangles and the multigrid approach.

TABLE is a file format used for the FEM files.

TABLE_IO is a MATLAB library of routines for reading and writing TABLE files.

TEC is a data directory which contains a description and examples of the TEC graphics files used by TECPLOT

TEC_IO is a library of MATLAB routines for reading or writing a TEC file containing a finite element model.

TEC_TO_FEM is a MATLAB program that can convert a TEC file into an FEM model.

Source Code:

• ch_is_alpha.m returns TRUE if a character is alphabetic.
• dtable_data_read.m reads a table from a double precision table file.
• dtable_header_read.m reads the header from a double precision table file.
• fem_read.m reads the node coordinate, element and node data files defining a finite element model.
• file_column_count.m counts the number of columns in a file.
• file_name_specification.m determines the names of the input files.
• file_row_count.m counts the number of rows in a file.
• itable_data_read.m reads a table from an integer table file.
• itable_header_read.m reads the header from an integer table file.
• s_alpha_last.m returns the location of the last alphabetic character in a string.
• s_inc.m "increments" a string.
• s_len_trim.m returns the length of a string to the last nonblank.
• s_word_count.m counts the number of words in a line.
• tec_write.m writes the FEM data to a TEC file.
• timestamp.m prints the current YMDHMS date as a timestamp.

Examples and Tests:

ELL is an example of a 2D finite element model in which a scalar value is stored. This data was computed by the FREE_FEM_POISSON program.

• ell_node_coord.txt
• ell_element.txt
• ell_node_data.txt
• ell.tec

TINY is a "tiny" example of a 2D finite element model in which a vector value is stored.

• tiny_node_coord.txt
• tiny_element.txt
• tiny_node_data.txt
• tiny.tec

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