Videos

The amazing bouncing droplet

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by injecting fresh air under the droplet. This can happen when the surface of the bath oscillates vertically. In this case the droplet basically bounces on the interface. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. Lord Rayleigh expressed the droplet deformation modes in terms of spherical harmonics Y m. We present different experimental modes of deformation with the corresponding spherical harmonic model. In some conditions, a droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the droplet and to a horizontal displacement.
The amazing bouncing droplet
When a low viscosity oil droplet is laid onto the...
Frozen splash
We have studied the splashing dynamics of water drops impacting...
The Tibetan Singing Bowl
The Tibetan singing bowl is a type of standing bell....
A fountain of droplets
A vessel is plunged upside down into a pool of...
From bouncing to boxing - Gallery of nonlinear images 2008
A droplet of silicon oil is released above the surface...
Dancing droplets - Gallery of fluid motion 2006
When a droplet is gently laid on the surface of...
The mayonnaise droplet
A droplet made of 2 components is laid on a...
Dancing droplets on an Ipod
With just an Ipod and a loudspeaker, it's possible to...
Physiciens en microgravité !
Notre équipe «Lès Lidjwès» (les Liégeois en wallon) de l'Université...
Maizena Monster
When Maizena is shaken vertically it reveals monsters....
1/2

Explore and wonder …