{
  "abstract": "This study investigates the Reynolds-number (Re_τ) evolution of wall-pressure statistics beneath zero-pressure-gradient TBLs, and links their logarithmic variation to the increasingly energetic large-scale motions in the logarithmic region. The wall-pressure skewness is found to become more negative with increasing Re_τ, owing to increasing contributions from large-scale wall-pressure fluctuations (that are negatively skewed) and their nonlinear interaction with the statistically invariant inner-scale fluctuations (that are positively skewed). The analysis draws on new, well-resolved simultaneous measurements of wall pressure and streamwise velocity spanning 5000 < Re_τ< 11300 in the Melbourne tunnel, atmospheric surface-layer measurements at Re_τ= O(10^6) and a published simulation dataset at Re_τ= O(10^3). Particular attention is paid to the principal experimental limitations affecting wall-pressure statistics: spatial resolution, Helmholtz resonance, facility noise and statistical convergence. Helmholtz resonance is shown to contaminate inner-scale wall-pressure contributions even after conventional corrections, and reliable estimation of skewness is found to require acquisition durations of O(10^5) eddy-turnover times or longer. The inner-scaled wall pressure spectrum is Reynolds-number invariant over the small-scale regime, in contrast to turbulent channel and pipe flows, whereas at intermediate and large scales it grows substantially with Re_τ, consistent with these internal flows. Linear and quadratic velocity--wall-pressure coherence link these intermediate- and large-scale contributions to two dynamically distinct coherent structures: the self-similar attached-eddy hierarchy and turbulent superstructures, respectively. These analyses establish the connection between the inertial region and the log variation of wall-pressure variance and skewness with Re_τ",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.02121",
  "author_total": 5,
  "authors": [
    {
      "name": "Rahul Deshpande"
    },
    {
      "name": "Balaraman Panneerselvam"
    },
    {
      "name": "Vijaya R. R. Gudla"
    },
    {
      "name": "Joe Klewicki"
    },
    {
      "name": "Ivan Marusic"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b8ym8p6gggpjf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.02121",
  "fulltext_url": null,
  "id": "b8ym8p6gggpjf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.02121",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.flu-dyn"
    ],
    [
      "openalex",
      "2206|Fluid Dynamics and Turbulent Flows"
    ]
  ],
  "openalex": "W7207529976",
  "pdf_url": "https://arxiv.org/pdf/2609.02121",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b8ym8p6gggpjf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2609.02121",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.02121"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Reynolds-number evolution of wall-pressure statistics beneath canonical turbulent boundary layers",
  "title_text": "Reynolds-number evolution of wall-pressure statistics beneath canonical turbulent boundary layers",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/b8ym8p6gggpjf",
  "venue": "arXiv",
  "versions": []
}