Core: Flow fields incorrect when generating Compartment Model from CFD

[Benncs]

Flow fields incorrect when generating Compartment Model from CFD

Description
When generating a Compartment Model (CM) from CFD data, scalar fields are generated correctly, but flow fields are incorrect.

Observed behavior

• Scalar fields match expectations
• Flow fields deviate significantly from CFD results

Suspected cause

• Likely originates from compute_intersection_area
• Original implementation uses bounding box planes
• Porting to more generic bounded planes seems to trigger errors in computed intersection areas

Steps to reproduce

1. Generate CM from CFD using current compute_intersection_area
2. Compare with c++ results

Notes

• Plane-bounding differences in intersection computation may be the source
• Fixing cross-sectional area calculation could resolve the issue