Hysteresis and non-uniqueness in the speed of the onset of instability in curtain coating

J. O. Marston*, S. P. Decent, M. J. H. Simmons

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The maximum speed of stable coating is determined experimentally by the onset of air entrainment in curtain coating onto a pre-wetted surface over a broad range of dimensionless parameters (Reynolds number: 0.14 < Re < 33.02; capillary number: 0.19 < Ca < 25.07). We show not only that the substrate speed at the onset of instability is flow-rate dependent for a pre-wetted surface, but that the speed at which instability occurs is not always unique for a given flow rate.
Original languageEnglish
Pages (from-to)349-363
Number of pages15
JournalJournal of Fluid Mechanics
Volume569
Early online date15 Nov 2006
DOIs
Publication statusPublished - 25 Dec 2006
Externally publishedYes

Keywords

  • air entrainment
  • coating
  • instability
  • flow rate

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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