When sound slows down bubbles
| Autor: | Rémi Dangla, Cedric Poulain |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Flow visualization
Bubble Computational Mechanics FOS: Physical sciences Noise spectrum Pattern Formation and Solitons (nlin.PS) Faraday wave Physics::Fluid Dynamics symbols.namesake Sound (geography) Fluid Flow and Transfer Processes Physics geography geography.geographical_feature_category Mechanical Engineering Velocity reduction Fluid Dynamics (physics.flu-dyn) Sound field Mechanics Physics - Fluid Dynamics Condensed Matter Physics Nonlinear Sciences - Chaotic Dynamics Nonlinear Sciences - Pattern Formation and Solitons High speed video Mechanics of Materials symbols Chaotic Dynamics (nlin.CD) |
| Popis: | We present experimental evidence that a bubble moving in a fluid in which a well-chosen acoustic noise is superimposed can be significantly slowed down for moderate acoustic pressures. Through mean velocity measurements, we show that a condition for this effect to occur is for the acoustic noise spectrum to match or overlap the bubble's fundamental resonant mode. By rendering the bubble's oscillations and translational movements using high speed video, we evidence that radial oscillations have no effect on the mean velocity, while above a critical sound pressure threshold, Faraday waves are triggered and are responsible for the bubble's drag increase. 4 pages, to appear in Physics of Fluids |
| Databáze: | OpenAIRE |
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