On the physics of transient ejection from bubble bursting
| Autor: | Alfonso M. Gañán-Calvo, Jose M. Lopez-Herrera |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Mechanical Engineering media_common.quotation_subject Flow (psychology) Fluid Dynamics (physics.flu-dyn) FOS: Physical sciences Mechanics Physics - Fluid Dynamics Condensed Matter Physics Inertia Sea spray Ohnesorge number Vortex ring Surface tension Physics::Fluid Dynamics Singularity Mechanics of Materials Transient (oscillation) media_common |
| Popis: | The transient ejection due to a bubble bursting at the interface of a liquid with a gas environment is here described using a dynamical scaling analysis along the process. We show here that the ejection of a liquid microjet requires the backfire of a vortex ring inside the liquid to preserve physical symmetry, which involves a non-trivial scaling. We present the first single uniformly valid expression for the size and speed of ejected droplets for the whole range of the Ohnesorge and Bond numbers where droplet ejection occurs. The evolution of the flow variables, the apparent singularity for a critical Ohnesorge number, and the dispersion of data around this point are explained. Our model generalizes or displaces other recently proposed ones, impacting for instance the statistical description of sea spray. 10 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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