{
  "annotation_id": "b6eff923-16c1-44ef-a779-f816a43a02ac",
  "date_created": "2026-03-02T18:01:11.223000Z",
  "date_modified": "2026-03-02T18:01:11.223000Z",
  "file_hash": "5bea35af371bcd34a8dc6d5e2c51d7d4f201d2b66e1aa5de63fe8cd3d529a2af",
  "private": false,
  "record": {
    "abstract": "The system of hydrodynamic-type equations is derived from Alexeev\u0027s\ngeneralized Boltzmann kinetic equation by two-side distribution function for a\nstratified gas in gravity field. It is applied to a problem of ultrasound\npropagation and attenuation. The linearized version of the obtained system is\nstudied and compared with the Navier-Stokes one at arbitrary Knudsen numbers.\nThe problem of a generation by a moving plane in a rarefied gas is explored and\nused as a test while compared with experiment. It is good agreement between\npredicted propagation speed, attenuation factor and experimental results for a\nwide range of Knudsen numbers.",
    "arxiv_id": "physics/0608133",
    "authors": [
      "Sergey B. Leble",
      "Maxim A. Solovchuk"
    ],
    "categories": [
      "physics.flu-dyn"
    ],
    "title": "Fluid dynamics at arbitrary Knudsen on a base of Alexeev-Boltzmann   equation: sound in a rarefied gas",
    "url": "https://arxiv.org/abs/physics/0608133"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1def98cf-8c58-4e71-9365-d6ae75f1a8d1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}