{
  "id": "1903.09350",
  "version": "v1",
  "published": "2019-03-22T04:10:29.000Z",
  "updated": "2019-03-22T04:10:29.000Z",
  "title": "Dip-coating of suspensions",
  "authors": [
    "A. Gans",
    "E. Dressaire",
    "B. Colnet",
    "G. Saingier",
    "M. Z. Bazant",
    "A. Sauret"
  ],
  "journal": "Soft matter, 15(2), 252-261 (2019)",
  "doi": "10.1039/C8SM01785A",
  "categories": [
    "physics.flu-dyn",
    "cond-mat.soft"
  ],
  "abstract": "Withdrawing a plate from a suspension leads to the entrainment of a coating layer of fluid and particles on the solid surface. In this article, we study the Landau-Levich problem in the case of a suspension of non-Brownian particles at moderate volume fraction $10\\% < \\phi < 41\\%$. We observe different regimes depending on the withdrawal velocity $U$, the volume fraction of the suspension $\\phi$, and the diameter of the particles $2\\,a$. Our results exhibit three coating regimes. (i) At small enough capillary number $Ca$, no particles are entrained, and only a liquid film coats the plate. (ii) At large capillary number, we observe that the thickness of the entrained film of suspension is captured by the Landau-Levich law using the effective viscosity of the suspension $\\eta(\\phi)$. (iii) At intermediate capillary numbers, the situation becomes more complicated with a heterogeneous coating on the substrate. We rationalize our experimental findings by providing the domain of existence of these three regimes as a function of the fluid and particles properties.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-03-22T04:10:29.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "suspension",
      "moderate volume fraction",
      "intermediate capillary numbers",
      "liquid film coats",
      "large capillary number"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}