| Autor: |
Jacco H. Snoeijer, Antonin Eddi, K.G. Winkels |
| Přispěvatelé: |
Faculty of Science and Technology, Physics of Fluids |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Physical review letters, 111(14):144502. American Physical Society |
| ISSN: |
0031-9007 |
| DOI: |
10.1103/physrevlett.111.144502 |
| Popis: |
The coalescence of water drops on a substrate is studied experimentally. We focus on the rapid growth of the bridge connecting the two drops, which very quickly after contact ensues from a balance of surface tension and liquid inertia. For drops with contact angles below 90°, we find that the bridge grows with a self-similar dynamics that is characterized by a height h∼t 2/3 . By contrast, the geometry of coalescence changes dramatically for contact angles at 90°, for which we observe h∼t 1/2 , just as for freely suspended spherical drops in the inertial regime. We present a geometric model that quantitatively captures the transition from 2/3 to 1/2 exponent, and unifies the inertial coalescence of sessile drops and freely suspended drops |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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