FaceGroup Specification of min Passage Size

[NasserFlexCompute]

Note

Low Risk
Small additive schema change plus fixture/test updates; limited to Geometry-AI meshing parameters and should be backward compatible.

Overview
Adds per-face-group min_passage_size support to GeometryRefinement, allowing local control over the hidden-geometry removal passage threshold (otherwise derived from geometry_accuracy/sealing_size).

Updates the GAI surface meshing translator reference JSON and the translator test to include and validate serialization of min_passage_size in refinement output.

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[Copilot]

Pull request overview

This PR adds support for specifying min_passage_size at the face group level through the GeometryRefinement class. This allows users to override the global min_passage_size setting (from MeshingDefaults) for specific face groups, providing finer control over hidden geometry removal resolution.

Changes:

• Added min_passage_size field to GeometryRefinement class for per-face-group specification
• Updated test to include min_passage_size parameter in a GeometryRefinement instance
• Updated reference JSON to reflect the expected serialization format

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
flow360/component/simulation/meshing_param/face_params.py	Added min_passage_size as an optional field to GeometryRefinement class with appropriate type hints and description
tests/simulation/translator/test_surface_meshing_translator.py	Added test coverage for the new min_passage_size field in a GeometryRefinement refinement
tests/simulation/translator/ref/surface_meshing/gai_surface_mesher.json	Updated reference JSON to include the expected serialization of min_passage_size field

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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Missing validation for min_passage_size against remove_hidden_geometry

Medium Severity

The min_passage_size field on GeometryRefinement lacks the validation that exists at the defaults level in MeshingDefaults, where validate_min_passage_size_requires_remove_hidden_geometry ensures min_passage_size is only specified when remove_hidden_geometry is True. The field description explicitly ties it to "hidden geometry removal," but a user can set it on a face group without remove_hidden_geometry being enabled globally, leading to a silently ignored or inconsistently validated parameter.