When a liquid drop falls on a solid substrate, the air layer between them delays the
occurrence of liquid–solid contact. For impacts on smooth substrates, the air film can even …

The rebound of droplets impacting a deep fluid bath is studied both experimentally and
theoretically. Millimetric drops are generated using a piezoelectric droplet-on-demand …

Rain cleans pollution out of the atmosphere, as droplets collide with airborne particles
during free fall. Such particle–droplet collisions have been presumed to be capture events …

We investigate theoretically and numerically the impact of an elastic sphere on a rigid wall in
a viscous fluid. Our focus is on the dynamics of the contact, employing the soft lubrication …

We present and analyze a theoretical model for the dynamics and interactions of “capillary
surfers,” which are millimetric objects that self-propel while floating at the interface of a …

We study the drag on a centimetric sphere in a uniform flow in the presence of a free surface
as a function of submergence depth. Through direct force measurements in a custom …

We experimentally investigate the impact of a millimetric superhydrophobic sphere on a
water pool covered by a thin oil layer, with the aim of seeking the critical conditions for …

Over many years, there has been great practical interest in how solid bodies interact with
and skim on liquid layers. In the present investigation, the focus is on the important role of …

A horizontal cylinder with a concave cross-section partially submerged in a liquid at a given
position may permit multiple menisci around itself. The number and stabilities of the menisci …

We study the axisymmetric impact of a rigid sphere onto an elastic membrane theoretically
and experimentally. We derive governing equations from first principles and impose natural …