{
  "abstract": "We propose a partitioned numerical framework for the simulation of fluid-structure interaction problems in fast transient regimes, where strong compressibility effects and shock waves propagate across moving interfaces. The method is designed to combine arbitraryorder accurate time integration, sub-cycling capabilities, and strict discrete conservation properties within a unified formulation. The coupling strategy is formulated at the algebraic level through a saddle-point problem that enforces the conservation of mass, momentum, and total energy at the fluid-structure interface. Under standard definiteness assumptions inherited from the underlying fluid and solid discretizations, the coupled problem is well posed and admits a unique solution. Highorder time accuracy is achieved by enforcing the coupling conditions consistently at each Runge-Kutta stage, while sub-cycling allows the fluid and solid solvers to evolve according to their respective stability constraints without introducing temporal interpolation at the interface. The method is designed to combine a Runge-Kutta time-sub-cycling framework of arbitrary order, strict discrete conservation properties, and independent stability constraints for the fluid and solid subdomains. The present work uses a second-order finite-volume spatial discretization. The smooth one-dimensional Kidder test is used to verify that the proposed sub-cycling strategy preserves the expected temporal convergence order of the underlying Runge-Kutta method. The remaining shock-dominated one-, two-, and threedimensional test cases are used to assess conservation, robustness, and computational efficiency in fast transient fluid-structure interaction regimes. These results establish a systematic approach for the construction of conservative partitioned FSI methods with high-order time-sub-cycling capabilities suitable for fast dynamics and disparate time scales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "name": "Teddy Chantrait"
    },
    {
      "name": "Nicolas Chevaugeon"
    },
    {
      "name": "Alexandre Gangloff"
    },
    {
      "name": "Emmanuel Labourasse"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e0t4fpfbt2g1p.bib",
  "cited_by": 0,
  "doi": "10.1016/j.cma.2026.119195",
  "fulltext_url": null,
  "id": "e0t4fpfbt2g1p",
  "issns": [
    "0045-7825",
    "1879-2138"
  ],
  "landing_url": "https://hal.science/hal-05742384v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
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      "0.math"
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      "hal",
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    [
      "openalex",
      "2206|Advanced Numerical Methods in Computational Mathematics"
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  "openalex": "W7167217044",
  "pdf_url": "https://hal.science/hal-05742384/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/e0t4fpfbt2g1p.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "hal-05742384",
      "source": "hal",
      "url": "https://hal.science/hal-05742384v1"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "hal:1.math.math-na",
      "subfield": "numerical-analysis"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "An arbitrary-order time-sub-cycling framework for conservative partitioned fluid–structure interaction",
  "title_text": "An arbitrary-order time-sub-cycling framework for conservative partitioned fluid–structure interaction",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:31Z",
  "url": "https://research.draconitic.com/paper/e0t4fpfbt2g1p",
  "venue": "Computer Methods in Applied Mechanics and Engineering",
  "versions": []
}