One-equation k RANS: wall condition, closure fixes, terrain wall distance, Canonical_RANS regression cases - #3971

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hgopalan wants to merge 18 commits into

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hgopalan:claude-RANS

Commits on Sep 9, 2026

Canonical RANS phase 1: neutral flat-ABL deck, numeric check script, CTest hook

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4bec86c
Canonical RANS phase 2: hold the Dirichlet wall value of k through the step

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31a8e79
k-eqn RANS: warn when a surface-layer run leaves erf.dirichlet_k off

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68cb762
Canonical RANS phase 3: closure header, input validation, bounded unstable length, unit tests

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05a9ccd
Canonical RANS plan: phases 9 and 10, implicit vertical diffusion under anelastic

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33af68b
Canonical RANS phase 4: consistent diffusivities, PBL-height length cap, stable and convective decks

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105502a
Canonical RANS phase 5: cell-centred wall-distance gradient, 2D ridge deck

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6cf14c3
Canonical RANS phase 6: terrain-height wall distance, 3D hill deck, restart on terrain

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456159d

Commits on Sep 10, 2026

Commits on Sep 11, 2026

Merge branch 'development' into claude-RANS
asalmgren
authored
a79056a
Merge branch 'development' into claude-RANS
asalmgren
authored
de7c7d5
Merge branch 'development' into claude-RANS
asalmgren
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4c1bae3
Merge remote-tracking branch 'upstream/development' into claude-RANS
hgopalan
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fcb258f
Canonical RANS CTests: run the flat cases with MLMG and gate the terrain cases on FFT

hgopalan
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3eff4c7
terrain_height wall distance: gather the surface nodes onto every box; correct the dz != dx notes

hgopalan
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9a9207f