{
  "abstract": "We investigate the dynamics of self-propelled spheroidal particles in electroosmotic channel flows generated by uniform, patterned, and combined zeta-potential distributions. The coupling between self-propulsion, particle shape, and electroosmotic advection gives rise to distinct regimes of confinement and transport. For a uniform zeta potential, the dynamics reduce to a two-dimensional system in cross-stream position and orientation. We show that this system possesses a non-canonical Hamiltonian structure, allowing its phase-space organization to be characterized analytically. For spherical particles, the dynamics admit a nonlinear-pendulum description, yielding the characteristic oscillation frequency and extent of the confined region. The oscillation frequency depends non-monotonically on electrostatic screening and reaches a maximum at an intermediate Debye parameter. Spatially patterned zeta potentials reorganize the dynamics by generating counter-rotating vortices and coupling streamwise position, cross-stream position, and particle orientation. Numerical simulations and dynamical-systems analysis reveal regimes of single-cell confinement and cross-cell migration, controlled by particle shape and electrostatic screening. When uniform and patterned components coexist, mean electroosmotic advection competes with vortex-induced recirculation, producing transport sensitive to particle shape and initial conditions. Together, these results connect Hamiltonian phase-space dynamics in uniform electroosmotic flow to vortex-mediated trapping and transport in patterned flows, highlighting the potential of surface electrostatic patterning to control particle motion without altering channel geometry.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.00600",
  "author_total": 3,
  "authors": [
    {
      "name": "Aritra Roy"
    },
    {
      "name": "Antarip Poddar"
    },
    {
      "name": "Rahil Valani"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/df6qzzbyyej0a.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.00600",
  "fulltext_url": null,
  "id": "df6qzzbyyej0a",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.00600",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2611.00600",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/df6qzzbyyej0a.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.00600",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.00600"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Active particle dynamics in uniform and patterned electroosmotic flows",
  "title_text": "Active particle dynamics in uniform and patterned electroosmotic flows",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/df6qzzbyyej0a",
  "venue": "arXiv",
  "versions": []
}