{
  "$schema": "https://themachinepress.com/schemas/story-v1.schema.json",
  "schema_version": "1.0.0",
  "document_type": "machine_press_story",
  "story": {
    "story_id": "mp-2026-11-07-001",
    "source_story_id": "tmp-lead-full-human-blood-flow",
    "edition_id": "mp-2026-11-07-morning-0120",
    "edition_url": "https://themachinepress.com/edition/2026-11-07",
    "position": 1,
    "story_type": "lead",
    "section": "research",
    "editorial_classification": "editorial",
    "headline": "The Whole Arterial Tree Enters One Simulation",
    "slug": "the-whole-arterial-tree-enters-one-simulation",
    "dek": "An exascale-ready model follows blood from the aortic root to 432 outlets while cutting the estimated compute cost 625-fold against direct simulation.",
    "summary": "An exascale-ready model follows blood from the aortic root to 432 outlets while cutting the estimated compute cost 625-fold against direct simulation.",
    "body_text": "Whole-body arterial flow has been too expensive to resolve at useful detail because every lattice site must advance through each time step. The HemeLB team combined its lattice-Boltzmann solver with large-eddy simulation and sustained about 10 trillion lattice-site updates per second on both Frontier and Aurora. At 100-micrometer resolution, the method reduced the estimated cost by roughly 625 times relative to a 20-micrometer direct simulation while keeping plane-averaged pressure within 0.75 mmHg in a stenotic-aorta comparison. The resulting 295-million-site model spans cerebral arteries to the feet, with one aortic inlet and 432 Windkessel outlets, and runs a cardiac cycle in about 15 to 18 node-hours on two Frontier nodes. This is a computational study, not a validated patient-specific diagnostic, but it brings simultaneous head-to-feet hemodynamics within reach of current supercomputers.",
    "why_it_matters": "An exascale-ready model follows blood from the aortic root to 432 outlets while cutting the estimated compute cost 625-fold against direct simulation.",
    "limitations": [
      "This is a computational study, not a validated patient-specific diagnostic, but it brings simultaneous head-to-feet hemodynamics within reach of current supercomputers."
    ],
    "importance": 10,
    "canonical_url": "https://themachinepress.com/story/mp-2026-11-07-001/the-whole-arterial-tree-enters-one-simulation",
    "json_url": "https://themachinepress.com/story/mp-2026-11-07-001.json",
    "first_published_at": "2026-11-07T09:00:00.000-05:00",
    "modified_at": "2026-11-07T09:00:00.000-05:00",
    "content_status": "updated",
    "is_carryover": false,
    "carryover_reason": null,
    "key_claims": [
      {
        "claim_id": "claim-mp-2026-11-07-001-001",
        "text": "An exascale-ready model follows blood from the aortic root to 432 outlets while cutting the estimated compute cost 625-fold against direct simulation.",
        "source_ids": [
          "source-2026-11-07-001"
        ],
        "qualification": "This is a computational study, not a validated patient-specific diagnostic, but it brings simultaneous head-to-feet hemodynamics within reach of current supercomputers."
      }
    ],
    "source_ids": [
      "source-2026-11-07-001"
    ],
    "tags": [
      "exascale computing",
      "blood flow",
      "large-eddy simulation",
      "biomedical engineering"
    ],
    "image_url": "https://themachinepress.com/issues/2026-11-07/lead-full-human-blood-flow.png",
    "corrections": [
      {
        "correction_id": "correction-2026-11-07-001",
        "revision": 2,
        "summary": "Publication note: This November 7 edition was assembled before its scheduled 9:00 AM America/Detroit reveal but is being published late after recovery from a local build interruption. Its original reporting, image-generation times and scheduled publishAt are preserved.",
        "published_at": "2026-11-07T09:00:00.000-05:00",
        "affected_story_ids": [],
        "affected_claim_ids": []
      }
    ]
  },
  "sources": [
    {
      "source_id": "source-2026-11-07-001",
      "title": "arXiv preprint 2611.07840, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2611.07840v1",
      "canonical_url": "https://arxiv.org/abs/2611.07840v1",
      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-11-05T06:16:12.000-05:00",
      "accessed_at": "2026-11-07T08:24:00.000-05:00",
      "supports_claim_ids": [
        "claim-mp-2026-11-07-001-001"
      ]
    }
  ],
  "corrections": [
    {
      "correction_id": "correction-2026-11-07-001",
      "revision": 2,
      "summary": "Publication note: This November 7 edition was assembled before its scheduled 9:00 AM America/Detroit reveal but is being published late after recovery from a local build interruption. Its original reporting, image-generation times and scheduled publishAt are preserved.",
      "published_at": "2026-11-07T09:00:00.000-05:00",
      "affected_story_ids": [],
      "affected_claim_ids": []
    }
  ],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
  },
  "cite_this_report": {
    "title": "The Whole Arterial Tree Enters One Simulation",
    "publisher": "The Machine Press",
    "published_at": "2026-11-07T09:00:00.000-05:00",
    "canonical_url": "https://themachinepress.com/story/mp-2026-11-07-001/the-whole-arterial-tree-enters-one-simulation"
  }
}