####### MeshGenExample #######

Description

This project is a meshing example based on gmsh and tetgen which is targeted at a mesh suitable for devsim device simulation in 3D.

Recommended Usage ===========

Execute the scripts in order of the enumeration.

01_generate_gmsh_stl.py

Generates a simple .stl geometry which resembles a cube of 1x1x1.

02_mesh_tetgen_and_convert.py

Uses tetgen.exe to generate a tetrehedral mesh of the .stl cube and converts the result back to the gmsh2.2 format.

03_mesh_define_contacts.py

Reads the converted gmsh mesh and attaches the contacts to the top and buttom surface. The mesh is scaled by a factor but the mesh in general should stay the same.

04_check_tetrahedra.py

Checks the tetrahedra in the mesh and compares them to theoretical values. Evaluates the total volume of the geometry for theoretical values and actual devsim values.

04_devsim_eletrical_sim.py

Performs a constructed electrical simulation. The dimensions, doping and mobility are chosen in a way that the volume has a resistance of 1 Ohm. Therefore the expected result of the simulation is 1A for 1V.

Resources

Tetgen

https://wias-berlin.de/software/tetgen/

Gmsh

https://gmsh.info/doc/texinfo/gmsh.html

Devsim

https://devsim.net/index.html

https://forum.devsim.org/

https://forum.devsim.org/t/drift-diffusion-simulation-for-3d-produces-higher-currents-than-expected