Droplet displacements and oscillations induced by ultrasonic surface acoustic waves: a quantitative study.
Phys Rev E Stat Nonlin Soft Matter Phys
; 81(3 Pt 2): 036315, 2010 Mar.
Article
in En
| MEDLINE
| ID: mdl-20365862
ABSTRACT
We present an experimental study of a droplet interacting with an ultrasonic surface acoustic wave. Depending on the amplitude of the wave, the drop can either experience an internal flow with its contact line pinned, or (at higher amplitude) move along the direction of the wave also with internal flow. Both situations come with oscillations of the drop free surface. The physical origins of the internal mixing flow as well as the drop displacement and surface waves are still not well understood. In order to give insights of the underlying physics involved in these phenomena, we carried out an experimental and numerical study. The results suggest that the surface deformation of the drop can be related to a combination between acoustic streaming effect and radiation pressure inside the drop.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev E Stat Nonlin Soft Matter Phys
Journal subject:
BIOFISICA
/
FISIOLOGIA
Year:
2010
Document type:
Article
Affiliation country:
France