Ray-tracing of Unstructured Meshes for Material Fractions

svalinn / r2s-act

Rigorous 2 Step Activation Workflow

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Ray-tracing of Unstructured Meshes for Material Fractions #38

Open erelson opened 11 years ago

erelson commented 11 years ago

As a precursor to running ALARA in the unstructured mesh workflow, the material fractions of each tetrahedron are needed.

Currently:

mmGridGen/mmgrid.py do this ray-tracing for structured meshes
Ray-tracing on unstructured meshes is done by DAGMC.

Am I correct that uniformly sampling a tet with rays is an open research question? Maybe something for an NE506 project? But might also need to be done sooner than that...

Derived from #3.

elliottbiondo commented 11 years ago

Shouldn't every tet only have 1 material?

erelson commented 11 years ago

That requires a conformal mesh, which isn't necessarily guaranteed (e.g. cylinders), especially if the geometry is originally an MCNP model, rather than a meshed CAD model. Or such is my understanding.

gonuke commented 11 years ago

We can delay this by assuming conformal mesh to begin.

erelson commented 11 years ago

Using the conformal mesh assumption, the material at each voxel's center point is determined and tagged to the mesh.

Relevant commit: d2e306aac899016909c1092ae578762250f78912