{
  "abstract": "We present RFBniCS, an open-source finite-element framework implemented in FEniCSx for simulating redox-flow-battery (RFB) half-cells. RFBniCS solves an established macro-homogeneous porous-electrode model accounting for strongly coupled electrolyte flow, multicomponent species transport, ionic and electronic charge conservation, and interfacial Faradaic charge transfer. Different from other open-access tools, RFBniCS can perform transient RFB half-cell simulations in one-, two-, and three-dimensional geometries while explicitly resolving the transport of both redox-active and supporting-electrolyte species. It also describes electrolyte flow through porous electrodes and, in the three-dimensional formulation, through adjacent flow channels. To verify the implementation, RFBniCS's predictions in parameter-limiting regimes are compared against other published implementations, with RFBniCS generally showing superior accuracy and speed. We further demonstrate RFBniCS's capabilities by a simulation of the transient response of the negative half-cell of a vanadium redox flow battery, with a moderately concentrated supporting electrolyte. In the current implementation, RFBniCS provides the computational basis for studying redox-flow-battery half-cells and can be extended to complex flow-field designs, alternative chemistries, full-cell coupling, detailed membrane transport, and additional multiphysics effects.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.01840",
  "author_total": 5,
  "authors": [
    {
      "name": "Amirhossein Aghabarari"
    },
    {
      "name": "Jørgen S. Dokken"
    },
    {
      "name": "Martin T. Horsch"
    },
    {
      "name": "Eirik Valseth"
    },
    {
      "name": "Mathijs Janssen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4henxas40za8m.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.01840",
  "fulltext_url": null,
  "id": "4henxas40za8m",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.01840",
  "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.comp-ph"
    ],
    [
      "openalex",
      "2208|Advanced battery technologies research"
    ]
  ],
  "openalex": "W7215747697",
  "pdf_url": "https://arxiv.org/pdf/2610.01840",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4henxas40za8m.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.01840",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.01840"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.comp-ph",
      "subfield": "computational"
    }
  ],
  "title": "RFBniCS: An open-source simulation framework for redox flow batteries",
  "title_text": "RFBniCS: An open-source simulation framework for redox flow batteries",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/4henxas40za8m",
  "venue": "arXiv",
  "versions": []
}