UWTN 2026-012: Benchmarking Stokes Flow in Annulus and Spherical-Shell Geometries - #11
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UWTN 2026-012, from gthyagi/UW3_Annulus_Spherical_Benchmarks/docs/benchmarks_blog_post. His prose is carried over as written; only the markup is converted. - <p align="justify"> wrappers dropped, HTML <sup> footnote anchors replaced by real citations, and the hand-written References list removed in favour of a bibliography MyST generates. Five entries pinned in references.bib rather than resolved from doi.org at build time, for the reason UWTN 2026-011 found the hard way. Thieulot & Puckett has no DOI, so it is an @Unpublished entry with the author-hosted URL. - <em>/<sub>/<sup> markup turned into real maths: L_2, q_h, P_2 x P_1, O(h^2), sigma_rr, Gamma_inner. ```math blocks became display maths. - Nine <img> tags became eight {figure} directives with alt text on ONE line, plus the banner. The combined-fields image is the banner, so the in-body copy of it was dropped and its caption folded into the text -- otherwise it renders twice, once from the injected banner block and once as a figure. Underworld development team with AI support from Claude Code
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…n the text Louis's call, and the right way round. The combined analytical-fields image was serving as the banner, which meant it could not also be a captioned figure where its author put it -- it would have rendered twice. A photograph in the header frees the figure to go back to the Benchmark Suite section with the caption gthyagi wrote for it. Nine figures again. The banner is credited through banner_credit in metadata.yml, not in the markdown. Writing the credit into the body does not survive: build-pdf strips the banner block and build-html regenerates it, so a hand-written credit is destroyed and replaced by a plain one. banner_credit is the field the regeneration reads, which is how Unsplash's attribution requirement survives a rebuild. Underworld development team with AI support from Claude Code
…thub.com/Underworld-Technical-Notes/underworldcode.org into note/annulus-spherical-stokes-benchmarks
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* News: introduce the Technical Notes A short post saying what the series is and why it exists: the writing people want to cite now has a version, an archival PDF and a DOI, and deposit is a decision rather than a consequence of publishing. Links to the first two notes, to how to submit, and to the listings. article_type: news, so it is not archival -- no PDF, no DOI, nothing to deposit. ID allocated as 2026-013, not the 2026-012 the script offered: that number is already taken by gthyagi's note on PR #11, which the allocator cannot see from this branch because it reads the articles present here. Underworld development team with AI support from Claude Code * Revise introduction to technical notes Updated the introduction to clarify the purpose and format of technical notes, emphasizing their role in documenting measurements and findings. * Banner for the news post Photo by Lukas Hron on Unsplash, credited through banner_credit in metadata.yml. Underworld development team with AI support from Claude Code * Update title for Technical Notes article
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…cator reissuing a number UWTN 2026-012 was allocated twice: to the annulus and spherical-shell benchmarks (#11) and to this note. The benchmarks note claimed it first and keeps it. The allocator read only the working tree, so a number claimed by a note in review on its own branch was invisible to it and was offered again. It now also searches every local and remote-tracking ref, which covers open pull requests as far as they have been fetched. Underworld development team with AI support from Claude Code
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Thyagarajulu Gollapalli's benchmark post, converted from
gthyagi/UW3_Annulus_Spherical_Benchmarks.At
review, so the preview picks it up.His prose is carried over as written. Only the markup is converted — no
edits to wording, structure or claims. If anything reads oddly, it is likely
something I broke rather than something he wrote.
What the conversion did
<p align="justify">wrappers dropped; MyST handles the typography.<sup>footnote anchors and the hand-written References listreplaced by real citations and a MyST-generated bibliography. Five entries
are pinned in
references.bibrather than resolved from doi.org at buildtime — UWTN 2026-011 found the hard way that a doi.org hiccup on CI publishes
a broken citation, and a deposited PDF cannot be repaired.
<em>,<sub>and<sup>markup turned into real maths:```mathblocks became display maths.<img>tags became eight{figure}directives with alt text, plus thebanner. Alt text is on one line each, because a wrapped directive option
silently truncates the alt and renders the remainder as a stray caption.
Three decisions worth a second opinion
The banner. The combined analytical-fields image is used as the banner. It
was also a captioned figure in the body, which would render it twice — once
from the injected banner block and once as a figure — so I dropped the in-body
copy and folded its caption into the surrounding text as a sentence. If
gthyagi would rather it stayed a numbered figure, the fix is to give the note a
different banner.
Thieulot & Puckett (2018) has no DOI — it is a preprint cited in the
original by an author-hosted PDF. It is an
@unpublishedentry carrying thatURL, which is the only persistent handle available.
Metadata I chose, since the source post has none: subjects
mantle-convection,planetary; methodsbenchmarks-validation,solvers,finite-elements.The four linked benchmark article PDFs stay as links to his repository rather
than being copied in.
Underworld development team with AI support from Claude Code