{
  "annotation_id": "b8ca5a3d-be66-4806-a3ef-f978ac85941b",
  "date_created": "2026-03-02T18:00:29.400000Z",
  "date_modified": "2026-03-02T18:00:29.400000Z",
  "file_hash": "a65a7e8c02fa033a378ccdf052c8257c38a78b63190df44c3c0967bf9b8f5d6f",
  "private": false,
  "record": {
    "abstract": "We have studied the early time evolution of granular segregation patterns in\na horizontal rotating cylinder partially filled with a sand/salt mixture. The\ngrowth of concentration fluctuations starting from premixed initial conditions\nwas analyzed using Fourier techniques. In one mixture, we observed generally\nmerging dynamics in the segregated bands up to the onset of saturation. At the\nthreshold of saturation, we found a spectrum of wavelengths with a broad peak.\nThe peak position was nearly independent of the tube rotation rate. The overall\ngrowth rate of Fourier modes had a maximum at a particular value of the angular\nrotation frequency. In a slightly different mixture, we observed transient\ntraveling waves when the larger grains were in the majority. We measured the\nwave speed as a function of several parameters using presegregated initial\nconditions to launch waves of various wavelengths.",
    "arxiv_id": "patt-sol/9804004",
    "authors": [
      "Kiam Choo",
      "Michael W. Baker",
      "T. C. A. Molteno",
      "Stephen W. Morris"
    ],
    "categories": [
      "patt-sol",
      "chao-dyn",
      "cond-mat.soft",
      "nlin.CD",
      "nlin.PS"
    ],
    "doi": "10.1103/PhysRevE.58.6115",
    "title": "The Dynamics of Granular Segregation Patterns in a Long Drum Mixer",
    "url": "https://arxiv.org/abs/patt-sol/9804004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f2e11fcd-347e-41f6-b203-4103a5780bf2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}