Stellarmesh is a meshing library for nuclear workflows. Principally, it supports the creation of DAGMC geometry from CAD models.

Features:

• ✅ Import of CadQuery, build123d, STEP and BREP geometry

• ✅ Surface and volume meshing

• ✅ Gmsh and OpenCASCADE meshing backends

• ✅ Linear and angular mesh tolerances

• ✅ Surface boundary conditions

• ✅ Imprinting and merging of conformal geometry

• ✅ Mesh refinement

• ✅ Programmatic manipulation of .h5m tags

• ✅ Automated testing and integration

Getting Started

• Installation

• Tutorials

• API

Example

import build123d as bd
import stellarmesh as sm

solids = [bd.Solid.make_torus(1000, 100)]
for _ in range(3):
    solids.append(bd.Solid.thicken(solids[-1].faces()[0], 100))
solids = solids[1:]

geometry = sm.Geometry(solids[::-1], material_names=["a", "a", "c"])
mesh = sm.SurfaceMesh.from_geometry(
    geometry, sm.GmshSurfaceOptions(min_mesh_size=50, max_mesh_size=200)
)
mesh.write("test.msh")
mesh.render("docs/torus-mesh-reversed.png", rotation_xyz=(90, 0, -90), normals=15)

h5m = sm.DAGMCModel.from_mesh(mesh)
h5m.write("dagmc.h5m")
h5m.write("dagmc.vtk")

Citing

If you use Stellarmesh in your research, please cite it. Citation metadata is available in the CITATION.cff file, and GitHub can generate APA or BibTeX entries from the “Cite this repository” button on the repository page.

Acknowledgements

Stellarmesh is originally a project of Thea Energy, who are building the world’s first planar coil stellarator.