From Dynamics of Water Entry by Tadd T. Truscott, Jeffrey M. Aristoff, Alexandra H. Techet & John Bush, Massachusetts Institute of Technology. The videos illustrate the hydrodynamics associated with water-entry of spheres, which can be highly variable with respect to their material and kinematic properties. The first video, contrasts the nature of impact between a [...]
The patterns formed by droplets falling through a different liquid was studied over a century ago. We perform similar experiments here, whereby droplets of naphthenic oil approximately 3 mm in diameter are released from several heights into a container filled with isopropyl alcohol. The oil is denser than and miscible in the alcohol, which results [...]
When a hollow, elastic ball has been partially filled with a fluid, the rebound after being dropped is suppressed quite substantially. This principle helps a roller hockey ball to remain on the ground rather than bounce during play. Future research may lead to other other applications such as passive damping systems based on sloshing liquids. In the video below, [...]
We utilize the synthetic aperture particle image velocimetry technique to visualize the air flow past an artificial vocal fold. The video explains the technique in more detail and highlights the jets formed in the wake of the vocal folds. The air passes through two silicone molds representing the vocal muscles inside the thorax. As [...]