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1  Basic information

1.1  Introduction

This manual discusses how to use the pre-post processor GID in combination with Tochnog. GID is copyrighted by CIMNE (the International Center for Numerical Methods in Engineering in Barcelona, Spain). See the links at our homepage for the GID program. The GID program is not covered by the GNU public license. However, you don’t pay anything if you only use a limited amount of nodes and elements. Usage of GID with an unlimited amount of nodes and elements costs only a nominal amount.

1.2  Legal Issues

The GNU GENERAL PUBLIC LICENSE applies for Tochnog-GID (so not for GID itself). It specifies COPYING conditions and a NO WARRANTY statement. It is included in the Tochnog users manual, and furthermore as a separate COPYING file in each distribution.

Realize that both my own written code and contributed code by others is owned (via copyright) by Dennis Roddeman. I do this with the explicit intention to make the code freely available under the Gnu Public License. It is setup this way because of logistics issues: legal decisions or modifications to the code would become completely unworkable if there were mixed copyrights. However, I want to credit and give thanks to those people that make the effort of creating code by maintaining a ’thanks to ...’ section in the homepage. You can also add ’Programmed by ...’ comments in the code that you contribute. If this is unacceptable for you, then don’t contribute code.

1.3  Distribution files and installation

Suppose that giddir is the directory where you installed GID. Make sure that the giddir is writable for you.

Make in giddir in the problemtypes directory a new directory tochnog.gid. Copy all files from the tochnog/gid/tochnog.gid directory to the giddir/problemtypes/tochnog.gid directory.

For unix, take care that the tochnog.bat and tochnog.bas files are executable (do a chmod +x if required).

1.4  Generate mesh from within GID

So please note that only nodes and elements will be written in preparation for a tochnog input file. Other data will not be written, and the gid calculate wil not start a real calculation. You should take the nodes and elements, finish the tochnog input file with an editor and then run tochnog in the usual way.

1.5  Plot results with GID

If you run the Tochnog calculation with the input file problemname.dat then you can plot with the postprocessor of GID .

In gid version 5:

In gid version 6:

Be sure that not both of problemname.flavia.dat and problemname.flavia.msh exist; GID gets a bit confused by that.


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