configs/conditioned_core.toml

[main]
core_mapping = "multi_block"
refinement_levels = 2
order = 3
include_external_domain = true
r_core = 0.25
r_star = 1.0
r_infinity = 6.0
flattening = 0.0
r_instability = 1e-14
core_steepness = 1.0
continuity_order = 2
surface_bdr_id = 1
inf_bdr_id = 2
core_id = 1
envelope_id = 2
vacuum_id = 3

[main.optimization_methods]
tmop = false
smoothstep = true
feat(topology): vacuum coordinate and multi block Two major changes in this version. First stroid now embeds a vacuum coordinate as part of its StroidMesh file (this is a packed set of mfem meshes and GridFunction). This is a logical coordinate from 0 at the stellar surface to 1 at the mesh surface / compactified infinity which can be used by consumers to much more stablly infer position in the vacuum region. Second, there is a new topology backend, multi_block, which has been made the default. See the readme for more information but the basic jist is that multi_block addes 6 transition blocks onto the edge of the core domain. This allows for a much more well conditioned transition from the internal cartesien region to the external spherical region. The mesh conditioning improves by roughly a factor of 1000 for the same refinement level when compared to the legacy topology. The legacy topology is maintained as a option if core_mapping is set to spherified in the config. 2026-09-09 08:11:08 -04:00			`[main]`
			`core_mapping = "multi_block"`
			`refinement_levels = 2`
			`order = 3`
			`include_external_domain = true`
			`r_core = 0.25`
			`r_star = 1.0`
			`r_infinity = 6.0`
			`flattening = 0.0`
			`r_instability = 1e-14`
			`core_steepness = 1.0`
			`continuity_order = 2`
			`surface_bdr_id = 1`
			`inf_bdr_id = 2`
			`core_id = 1`
			`envelope_id = 2`
			`vacuum_id = 3`

			`[main.optimization_methods]`
			`tmop = false`
			`smoothstep = true`