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 language | English |
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Pages (from-to) | 349-363 |
Number of pages | 15 |
Journal | Journal of Fluid Mechanics |
Volume | 569 |
Early online date | 15 Nov 2006 |
DOIs | |
Publication status | Published - 25 Dec 2006 |
Externally published | Yes |
Keywords
- air entrainment
- coating
- instability
- flow rate
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering