Reference : A fountain of droplets
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/110978
A fountain of droplets
English
Terwagne, Denis mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Delon, Giles mailto [Université de Liège - ULg > Département de physique > Optofluidique >]
Adami, Nicolas mailto [Université de Liège - ULg > Département de physique > Optofluidique >]
Vandewalle, Nicolas mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Caps, Hervé mailto [Université de Liège - ULg > Département de physique > Optofluidique >]
Dorbolo, Stéphane mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
21-Nov-2010
video presentation
No
No
International
63rd APS Division of Fluid Dynamics Meeting
21 novembre 2010 au 23 novembre 2011
American Physical Society
Long Beach
USA
[en] A vessel is plunged upside down into a pool of 50 cSt silicone oil. An air bell is then created. This bell is vertically shaken at 60 Hz that leads to the oscillation of the air/oil interface. The edges of the immersed vessel generate surface waves that propagate towards the center of the bell. When the amplitude of the oscillation increases, wave amplitude increases. We study the influence of the angle between successive sides on the wave patterns. Two kinds of vessel have been studied: a triangular and a square prism. The shape of the air/oil meniscus depends on the angle between the sides of the considered prism. As the amplitude of the oscillation is increased, the triple line, which is the contact line between the solid and the air/oil interface, moves up and down. Above a given acceleration that depends on the immersion depth and on the shape vessel, wave goes under the corner edge of the bell. During the oscillation, the wave generates at the edges presents a singularity that leads eventually to a jet and a drop ejection. A drop is ejected at each oscillation. More complicated ejection can be produced with further increase of the amplitude. This is a sample arXiv article illustrating the use of fluid dynamics videos.
http://hdl.handle.net/2268/110978

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