| Autor: |
Lebedev, Anatoliy, Dobroselsky, Konstantin, Safonov, Alexey, Starinskiy, Sergey, Sulyaeva, Veronica, Lobasov, Aleksei, Dulin, Vladimir, Markides, Christos N. |
| Předmět: |
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| Zdroj: |
Physics of Fluids; Dec2021, Vol. 33 Issue 12, p1-7, 7p |
| Abstrakt: |
We demonstrate that sectoral coating by a hydrophobic fluoropolymer is an effective method for controlling flow separation and the turbulent wake behind a cylinder in high Reynolds number flows (Re = 2.2 × 105). Time-resolved particle image velocimetry measurements show that the shape of the wake and trajectory of large-scale vortex structures are inclined due to delayed flow separation on one side of the cylinder. Near-wall, high-resolution visualization reveals that this effect is related to micro-bubbles traveling along the coated surface. The properties of the coatings and bubble presence did not deteriorate, even after many hours of continuous facility operation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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