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 |
|---|---|
| Pages (from-to) | 349-363 |
| Number of pages | 15 |
| Journal | Journal of Fluid Mechanics |
| Volume | 569 |
| DOIs | |
| Publication status | Published - 25 Dec 2006 |
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