{
  "_readme": [
    "Registry of the shared teaching images in this folder.",
    "",
    "Images live here, not beside the lecture that uses them, because subjects",
    "overlap and the same figure is often wanted by more than one. The folder is",
    "deliberately FLAT: an image used by both CFD and heat transfer has no single",
    "correct topic subfolder, and a filename that never changes is worth more",
    "than a tidy listing, because moving an image silently breaks every deck",
    "that references it.",
    "",
    "Reference one from a deck with a leading slash, whatever depth the deck is:",
    "    ![The JF-22 hypersonic wind tunnel](/images/jf22.png)",
    "The builder rewrites that into a relative path at build time.",
    "",
    "This is a RECORD, not a gate. convert.bat reports images with no entry,",
    "and entries whose file has gone, so the list stays complete. It does not",
    "police the licence field - most of these images are your own, so that",
    "warning would fire constantly and be wrong almost every time.",
    "",
    "FIELDS",
    "  description  What the image shows. It doubles as the default alt text and",
    "               caption, so write something that works read aloud and printed",
    "               under the figure - not the filename, and not 'Figure 3'.",
    "               Ends with a full stop, as all alt text and captions do.",
    "  source       Where it came from. A URL, a book or paper, or 'Own work'.",
    "               If you cropped or annotated it, say so.",
    "  obtained     When you got it, or made it. YYYY-MM-DD.",
    "  licence      What you are permitted to do with it, as far as you know.",
    "               'Own work' for most of these. For anything else, enough to",
    "               reconstruct the reasoning later if you are ever asked."
  ],
  "images": {
    "jf22.png": {
      "description": "The JF-22 hypersonic wind tunnel at the Chinese Academy of Aerodynamics: a vast cylindrical vessel running the length of a hangar, with a small aircraft model mounted in the open test section.",
      "source": "Pandaily, https://pandaily.com/jf22-hypersonic-wind-tunnel-10km-jul2026",
      "obtained": "2026-09-11",
      "licence": "Assumed all rights reserved. Used in teaching as fair dealing for illustration for instruction (CDPA 1988 s.32), with acknowledgement. Note that the exception is strongest for use in a lecture and weakest for publication on an open website."
    },
    "TrentXWBengine.png": {
      "description": "Cutaway render of a Rolls-Royce Trent XWB turbofan, sliced along its length so the fan, the compressor stages, the combustor and the turbine are all visible in line from front to rear.",
      "source": "NOT RECORDED - needs completing. Note: the file carries faint watermarking across it and has a transparent background, which usually means an unlicensed preview or comp rather than a released image",
      "obtained": "2026-09-11",
      "licence": "NOT RECORDED - needs completing. Rolls-Royce imagery is ordinarily all rights reserved"
    },
    "joe-scarborough-fluent.png": {
      "description": "A crowded, brightly coloured Joe Scarborough painting of Sheffield scenes: Victorian buildings, a pub, a tram, a football match in the foreground and the white Fluent offices flying international flags at the back, all packed into one busy townscape.",
      "source": "Painting by Sheffield artist Joe Scarborough, commissioned by Fluent Europe in 2000 when the company moved to premises next to the former Sheffield Airport. It traces the company's UK history back to the University of Sheffield. Taken from the NAFEMS blog, https://www.nafems.org/blog/posts/analysis-origins-fluent/ - a better primary reference may exist",
      "obtained": "2026-09-11",
      "licence": "All rights reserved. Copyright rests with Joe Scarborough and/or the commissioning company (now Ansys); NAFEMS reproduced it. Used in teaching as fair dealing for illustration for instruction, with acknowledgement"
    },
    "OpenAI_solvesNS_08092026.jpg": {
      "description": "Screenshot of a BBC News article headlined 'OpenAI says it cracked 90-year-old maths problem in 88 hours', with a Reuters photograph of OpenAI's chief executive below the headline.",
      "source": "BBC News, https://www.bbc.co.uk/news/articles/cy7zygy3rl2o, published 8 September 2026. Screenshot of the page; the photograph within it is credited to Reuters",
      "obtained": "2026-09-11",
      "licence": "BBC content, all rights reserved, and the embedded photograph is Reuters. Screenshot used in teaching as fair dealing for illustration for instruction, with acknowledgement"
    },
    "cfd_motor_AG.jpeg": {
      "description": "CFD simulation of cooling and windage loss inside a switched reluctance electrical motor: a cutaway of the motor body with coloured streamlines tracing air through the windings and velocity vectors fanning out past the rotor poles.",
      "source": "Own work, Andrew Garrard. Carries a University of Sheffield logo and a caption strip reading 'At the University of Sheffield Fluent and ICEM are used to develop novel methods for cooling copper windings in electrical motors'",
      "obtained": "2009-07-27 (file date)",
      "licence": "Own work"
    },
    "fuel_cell_mainfold_AG.jpg": {
      "description": "CFD analysis of swirl in the manifold of a fuel cell stack, shown as three stages side by side: the bare cylindrical manifold, then coloured streamlines spiralling along its length, then a dense vector field showing the swirl developing through the ports.",
      "source": "Own work, Andrew Garrard",
      "obtained": "2009-07-27 (file date)",
      "licence": "Own work"
    },
    "LockheedMartinHypersonic.jpg": {
      "description": "Artist's rendering of a Lockheed Martin hypersonic vehicle in flight: a slender dart-shaped craft, its leading edges glowing orange with the heat of the airflow, streaking through cloud high above the earth.",
      "source": "NOT RECORDED - needs completing. The vehicle carries Lockheed Martin markings, so it is most likely their own promotional render",
      "obtained": "2026-09-11",
      "licence": "NOT RECORDED - needs completing"
    },
    "Iron_Man.png": {
      "description": "Comic-style artwork of Iron Man in flight in red and gold armour, arms bent and chest reactor glowing, on a transparent background.",
      "source": "NOT RECORDED - needs completing. The filename pattern suggests a fan wiki rather than an official source",
      "obtained": "2026-09-11",
      "licence": "NOT RECORDED - needs completing. Marvel / Disney character, all rights reserved"
    },
    "cfd_drag_output.jpg": {
      "description": "Ansys Fluent's Force Reports dialog beside its console output for a sphere, breaking the force in the x direction into pressure and viscous parts. The total force, -0.14781418 N, is circled in red.",
      "source": "Own work, Andrew Garrard. Screenshot of Ansys Fluent, with the total force circled by hand",
      "obtained": "2026-09-28 (file date)",
      "licence": "Own work. The software interface shown is Ansys's"
    },
    "cfd_streamline_sphere.jpg": {
      "description": "A CFD result for flow past a sphere: coloured streamlines sweep past a sphere whose surface is shaded from blue on one side to red on the other, above a grid floor where the sphere casts a shadow.",
      "source": "Own work, Andrew Garrard. Rendered in Ansys 2025 R2 Student, whose watermark appears top right",
      "obtained": "2026-09-28 (file date)",
      "licence": "Own work. Made with the Ansys Student licence, whose watermark is left in place"
    }
  }
}