Converts Brep CAD geometry files to h5m geometry files compatible with DAGMC simulations
Project description
brep_to_h5m
A Python package that converts Brep CAD geometry files to h5m geometry files compatible with DAGMC simulations.
The method uses gmsh to create a conformal mesh of the geometry. The mesh is then converted into a h5m file using either the vertices-to-h5m (default) or stl-to-h5m package.
Installation (Conda)
Create a new enviroment and activate the enviroment.
conda create --name my_env
conda activate my_env
Then install this package
conda install -c fusion-energy -c conda-forge brep_to_h5m
The above command should also install moab
and gmsh
Installation (Conda + pip)
Create a new enviroment and activate the enviroment.
conda create --name my_env
conda activate my_env
Install dependancies that are not installed with pip (MOAB and GMSH)
conda install -c conda-forge moab
conda install -c conda-forge gmsh
conda install -c conda-forge python-gmsh
Then install this package
pip install brep_to_h5m
Usage
See the examples folder for a complete workflow from geometry creation to conversion to h5m and then use in and OpenMC simulation.
To make a Brep file with merged surfaces consider using the Paramak as it has a export_brep
method that merges the shared surfaces for Brep files.
Starting with a Brep file that has shared surfaces the following command should produce a DAGMC compatible h5m file.
from brep_to_h5m import brep_to_h5m
brep_to_h5m(
brep_filename='my_brep_file_with_merged_surfaces.brep',
material_tags=[
'material_for_volume_1',
'material_for_volume_2',
'material_for_volume_3',
'material_for_volume_4',
'material_for_volume_5',
'material_for_volume_6',
'material_for_volume_7',
'material_for_volume_8',
],
h5m_filename='dagmc.h5m',
min_mesh_size= 30,
max_mesh_size = 50,
mesh_algorithm = 1,
)
The resulting dagmc.h5m
file can now be used in neutronics simulation with DAGMC enabled transport codes.
Acknowledgement
Many thanks to @makeclean for suggesting gmsh for meshing and Brep for the CAD file format. Also for showing the way forwards by starting gmsh2dagmc.
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