Ribbing instability of Newtonian fluid coated on a topographic surface
| Autor: | Masato Yamamura |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Surface (mathematics)
Materials science Flow (psychology) 02 engineering and technology Surfaces and Interfaces General Chemistry Mechanics Viscous liquid 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Instability Capillary number 0104 chemical sciences Surfaces Coatings and Films Colloid and Surface Chemistry Critical speed Newtonian fluid 0210 nano-technology Groove (engineering) |
| Zdroj: | Journal of Coatings Technology and Research. 17:1447-1453 |
| ISSN: | 1935-3804 1547-0091 |
| DOI: | 10.1007/s11998-020-00375-8 |
| Popis: | Periodic wavy patterns emerge and align in a transverse direction once a viscous fluid is coated onto a surface moving above a critical speed. In this study, we examine how this flow instability, which is usually referred to as ribbing, is triggered or damped on a moving topographic surface. To examine the transient flow behavior, the liquid first came into contact with a smooth surface, followed by a downstream surface with small-scale V-shaped grooves. Flow visualizations revealed a topography-induced flow stabilization and a matching of rib frequencies with the underlying groove patterns, depending on the groove geometry and capillary number. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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