{
  "id": "1806.07058",
  "version": "v1",
  "published": "2018-06-19T06:13:06.000Z",
  "updated": "2018-06-19T06:13:06.000Z",
  "title": "Stability of boundary layer flow based on energy gradient theory",
  "authors": [
    "Hua-Shu Dou",
    "Wenqian Xu",
    "Boo Cheong Khoo"
  ],
  "comment": "5 pages; 4 figures",
  "journal": "Modern Physics Letters B, Vol. 32, Nos. 12 & 13 (2018), 1840003",
  "categories": [
    "physics.flu-dyn",
    "math.DS",
    "nlin.CD",
    "physics.ao-ph"
  ],
  "abstract": "The flow of the laminar boundary layer on a flat plate is studied with simulation of Navier-Stokes equations. The mechanisms of flow instability at external edge of the boundary layer and near the wall are analyzed using the energy gradient theory. The simulation results show that there is an overshoot on the velocity profile at the external edge of the boundary layer. At this overshoot, the energy gradient function is very large which results in instability according to the energy gradient theory. It is found that the transverse gradient of the total mechanical energy is responsible for the instability at the external edge of the boundary layer, which induces the entrainment of external flow into the boundary layer. Within the boundary layer, there is a maximum of the energy gradient function near the wall, which leads to intensive flow instability near the wall and contributes to the generation of turbulence.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-06-19T06:13:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "energy gradient theory",
      "boundary layer flow",
      "energy gradient function",
      "external edge",
      "flow instability"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}