{
  "annotation_id": "60babe9f-a814-4282-81ce-bee41d6cf608",
  "date_created": "2026-03-02T18:01:17.963000Z",
  "date_modified": "2026-03-02T18:01:17.963000Z",
  "file_hash": "ffad1894460ea86aa7926b632e5647f8d09288ef719d0f961ba20a352845583d",
  "private": false,
  "record": {
    "abstract": "The free motion of balls is investigated experimentally in continously\nstratified fluid in a finite container. The oscillation frequency is found to\nbe very close to the local Brunt-Vaisala frequency. The effect of added mass\nproves to be practically negligible. The evolution of rear jets is\ndemonstrated, and a kind of long term levitation is found. We show that the\nclassical viscous drag would lead to a much stronger damping than observed in\nthe experiment. This is interpreted as a consequence of the feedback from the\npreviously excited internal waves following their reflection from the\nboundaries. A phenomenological equation with a modified drag term is proposed\nto obtain a qualitative agreement with the observations. We point out that the\ninclusion of a history term would lead further away from the observed data.",
    "arxiv_id": "physics/0702208",
    "authors": [
      "I. Biro",
      "B. Gyure",
      "I. M. Janosi",
      "K. G. Szabo",
      "T. Tel"
    ],
    "categories": [
      "physics.flu-dyn"
    ],
    "doi": "10.1063/1.2927461",
    "journal_ref": "Physics of Fluids, Vol. 20, 051705 (2008).",
    "title": "Oscillation and levitation of balls in continuously stratified fluids",
    "url": "https://arxiv.org/abs/physics/0702208"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e14e985e-cbda-400b-aefb-dbffa507a828",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}