This project is a meshing example based on gmsh and tetgen which is targeted at a mesh suitable for devsim device simulation in 3D.
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.
https://wias-berlin.de/software/tetgen/
https://gmsh.info/doc/texinfo/gmsh.html
https://forum.devsim.org/t/drift-diffusion-simulation-for-3d-produces-higher-currents-than-expected