Add billowing

[1-Bart-1]

• Adds billowing distribution. Works by rotating chord between two unrefined segments with a sinusoidal pattern. Nonlinear solve to achieve a certain percentage trailing edge difference.
• Fix merge errors with main
• Fix test failure
• Fix JETLS warnings

[codecov]

Codecov Report

❌ Patch coverage is 84.21053% with 18 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/wing_geometry.jl	84.00%	12 Missing ⚠️
ext/VortexStepMethodControlPlotsExt.jl	86.66%	2 Missing ⚠️
ext/VortexStepMethodMakieExt.jl	90.47%	2 Missing ⚠️
src/body_aerodynamics.jl	0.00%	1 Missing ⚠️
src/settings.jl	50.00%	1 Missing ⚠️

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[ufechner7]

Can you increase the test coverage of the patch?

[Copilot]

Pull request overview

Adds a new “billowing” spanwise panel distribution to model fabric sag between ribs by rotating section chords with a sinusoidal profile, configurable via billowing_percentage and supported through YAML/settings, tests, and an example dataset.

Changes:

• Add BILLOWING as a PanelDistribution, plus billowing_percentage plumbing through Wing, YAML construction, and settings parsing.
• Implement TE billowing deformation during mesh refinement via per-rib-pair chord rotation with a nonlinear solve to match a target TE arc-length percentage.
• Add billowing tests, example script, documentation entry, and V3 kite sample data; update Makie plotting with shared legends and optional CL/CD plotting; clamp elliptical gamma distribution to avoid domain errors.

Reviewed changes

Copilot reviewed 34 out of 35 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
test/wing_geometry/test_billowing.jl	New test coverage for billowing geometry behavior and edge cases.
test/runtests.jl	Registers the new billowing test file in the test runner.
test/Project.toml	Adjusts test dependencies/compat and adds a dependency entry for the package under test.
src/yaml_geometry.jl	Adds billowing_percentage keyword support to YAML-based Wing construction.
src/wing_geometry.jl	Adds billowing_percentage to Wing, implements billowing refinement + helpers, and integrates BILLOWING into refine!.
src/VortexStepMethod.jl	Exports and documents the new BILLOWING panel distribution enum value.
src/settings.jl	Adds billowing_percentage to WingSettings and parses it from settings YAML.
src/obj_geometry.jl	Updates manual Wing struct construction to include the new billowing_percentage field.
src/body_aerodynamics.jl	Clamps elliptical gamma computation to avoid sqrt domain errors.
Project.toml	Formatting-only change (version line alignment).
NEWS.md	Documents breaking/added/changed/fixed items related to billowing and other updates.
ext/VortexStepMethodMakieExt.jl	Moves legends to shared layout, adds cl_over_cd option, and updates plotting layout.
examples/billowing.jl	New example comparing flat vs billowed V3 kite results.
docs/src/examples.md	Adds billowing example to the documented examples menu.
data/TUDELFT_V3_KITE/vsm_settings_coarse.yaml	New coarse V3 settings YAML including billowing_percentage.
data/TUDELFT_V3_KITE/aero_geometry_coarse_discretisation.yaml	New coarse V3 geometry YAML used by the billowing example.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/1.csv	Adds CFD/NF combined polar data for airfoil 1.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/2.csv	Adds CFD/NF combined polar data for airfoil 2.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/3.csv	Adds CFD/NF combined polar data for airfoil 3.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/4.csv	Adds CFD/NF combined polar data for airfoil 4.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/5.csv	Adds CFD/NF combined polar data for airfoil 5.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/6.csv	Adds CFD/NF combined polar data for airfoil 6.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/8.csv	Adds CFD/NF combined polar data for airfoil 8.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/10.csv	Adds CFD/NF combined polar data for airfoil 10.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/11.csv	Adds CFD/NF combined polar data for airfoil 11.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/12.csv	Adds CFD/NF combined polar data for airfoil 12.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/13.csv	Adds CFD/NF combined polar data for airfoil 13.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/14.csv	Adds CFD/NF combined polar data for airfoil 14.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/15.csv	Adds CFD/NF combined polar data for airfoil 15.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/16.csv	Adds CFD/NF combined polar data for airfoil 16.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/17.csv	Adds CFD/NF combined polar data for airfoil 17.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/18.csv	Adds CFD/NF combined polar data for airfoil 18.
data/TUDELFT_V3_KITE/polars_CFD_NF_combined/19.csv	Adds CFD/NF combined polar data for airfoil 19.

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[1-Bart-1]

Patch coverage should be better now

[ufechner7]

Please increase code coverage.

[Copilot]

Pull request overview

Copilot reviewed 36 out of 37 changed files in this pull request and generated 8 comments.

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