turbo_moc.meshing.stator_structured_2d module

Structured multi-block (O-H) 2D mesh of a stator blade passage.

TurboGrid-like topology on the same fluid domain as the unstructured mesh (stator_mesh_2d.stator_flow_domain): an O-grid around the blade carries the boundary layer – exactly num_layers cells at growth_ratio, first cell first_height – and five H-blocks fill the passage:

       inlet
+------------------+
|     upstream     |
+---------O--------+          O = LE' / TE': the O-grid's offset curve
| channel |channel |              at the blade's axial max / min, where
|  (one   O  (other|              pitchwise connectors start
|  side)  |   side)|
+---------O--------+
|    downstream    |
+------------------+
       outlet

Every block is a transfinite (TFI) quad patch, so the mesh is fully structured. Curves are split at block corners by exact knot insertion, so the geometry is the passage’s own B-splines (no resampling). The pitchwise connectors are horizontal (constant y): from the O-grid’s axial extremes they cannot cross the O-grid, and they meet each periodic side at the pitch-translated point of the other, keeping left/right periodic pieces exact translations.

Raises on anything it cannot build cleanly (offset self-intersection, inverted cells, …); stator_mesh_2d.mesh_sized_stator then falls back to the unstructured mesh.