{
  "abstract": "We analyze laminar-to-turbulent transition over a blunt capsule representative of Martian entry at Mach 26 using global modal and transient-growth analyses about a thermochemical base flow characteristic of high-altitude entry conditions. Across the Reynolds-number range considered ($Re_\\infty = 10^4$--$10^6$), the axisymmetric global eigenspectrum remains stable, ruling out temporally unstable axisymmetric global modes as a viable route to transition. The flow nevertheless supports strong transient growth concentrated in the shear--entropy layer generated by bow-shock curvature. Energy-budget analysis reveals a two-stage process: Reynolds-stress production in the mean shear first amplifies kinetic disturbances, which then generate entropy fluctuations as they traverse the strong base-flow entropy gradient. The optimal gain scales linearly with the Reynolds number based on the capsule nose radius, whereas boundary-layer-localized disturbances become competitive at the highest Reynolds numbers examined. These results identify shear--entropy-layer transient growth as a plausible linear pathway for seeding transition in high-enthalpy blunt-entry vehicles.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28885",
  "author_total": 2,
  "authors": [
    {
      "name": "Adrián Antón-Álvarez"
    },
    {
      "name": "Adrián Lozano-Durán"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2wanx7dr4ch67.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28885",
  "fulltext_url": null,
  "id": "2wanx7dr4ch67",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28885",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.flu-dyn"
    ],
    [
      "openalex",
      "2206|Fluid Dynamics and Turbulent Flows"
    ]
  ],
  "openalex": "W7214376650",
  "pdf_url": "https://arxiv.org/pdf/2609.28885",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2wanx7dr4ch67.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.28885",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28885"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Global modal/non-modal analysis of high-enthalpy Martian entry vehicles",
  "title_text": "Global modal/non-modal analysis of high-enthalpy Martian entry vehicles",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/2wanx7dr4ch67",
  "venue": "arXiv",
  "versions": []
}