Short time dynamics of viscous drop spreading
| Autor: | Jacco H. Snoeijer, Antonin Eddi, K.G. Winkels |
|---|---|
| Přispěvatelé: | Faculty of Science and Technology, Physics of Fluids |
| Rok vydání: | 2013 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Mechanical Engineering Drop (liquid) Contact line Fluid Dynamics (physics.flu-dyn) Computational Mechanics FOS: Physical sciences Time resolution Physics - Fluid Dynamics 02 engineering and technology Mechanics Dissipation Wetted area 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Mechanics of Materials Time dynamics 2023 OA procedure 0103 physical sciences Wetting 0210 nano-technology |
| Zdroj: | Physics of fluids, 25(1):013102. American Institute of Physics |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.4788693 |
| Popis: | Liquid drops start spreading directly after coming into contact with a solid sub- strate. Although this phenomenon involves a three-phase contact line, the spread- ing motion can be very fast. We experimentally study the initial spreading dy- namics, characterized by the radius of the wetted area, for viscous drops. Using high-speed imaging with synchronized bottom and side views gives access to 6 decades of time resolution. We show that short time spreading does not exhibit a pure power-law growth. Instead, we find a spreading velocity that decreases logarithmically in time, with a dynamics identical to that of coalescing viscous drops. Remarkably, the contact line dissipation and wetting effects turn out to be unimportant during the initial stages of drop spreading. |
| Databáze: | OpenAIRE |
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