{
  "abstract": "Flutter onset is determined by the sign of the aerodynamic work on the structure, but cycle-integrated work does not reveal where this energy transfer originates. We perform direct numerical simulations of incompressible flow over an aspect-ratio-two NACA 0015 wing pitching at $Re=1000$ and use lobe-resolved force-moment partitioning to identify the vortical contributions to aeroelastic power. The net energy transfer changes sign near $U^*=4.25$. Across this transition, the upper leading-edge contribution changes from damping at $U^*=2$ to excitation near onset and becomes the largest positive contribution at $U^*=6$. Near the stability boundary, positive leading-edge work is nearly balanced by negative trailing-edge work. This change is accompanied by a reorganization of the leading-edge pressure footprint and a reduction in the phase difference between aerodynamic moment and pitch rate, linking flutter onset to the timing of the leading-edge vortex system. A single slowly growing-amplitude simulation recovers the finite-amplitude energy boundary, while a free-pitching calculation confirms the predicted instability. As the motion approaches its limit cycle, the energy pathways redistribute, and a response-frequency-matched forced calculation reproduces the large-amplitude energy budget. These results distinguish the mechanism that triggers flutter from that which saturates the response and identify the leading edge as a natural target for flutter suppression.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.02402",
  "author_total": 3,
  "authors": [
    {
      "name": "Apoorva R. Parvathgari"
    },
    {
      "name": "Tulsi Ram Sahu"
    },
    {
      "name": "Aditya G. Nair"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/38b4e3pm0sngn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.02402",
  "fulltext_url": null,
  "id": "38b4e3pm0sngn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.02402",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.flu-dyn"
    ],
    [
      "openalex",
      "2202|Aeroelasticity and Vibration Control"
    ]
  ],
  "openalex": "W7220462680",
  "pdf_url": "https://arxiv.org/pdf/2610.02402",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/38b4e3pm0sngn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:45Z",
      "native_id": "2610.02402",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.02402"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Leading-edge energy transfer governs flutter onset of a pitching finite wing in low-Reynolds number flows",
  "title_text": "Leading-edge energy transfer governs flutter onset of a pitching finite wing in low-Reynolds number flows",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:45Z",
  "url": "https://research.draconitic.com/paper/38b4e3pm0sngn",
  "venue": "arXiv",
  "versions": []
}