2020.04.14 林楷育報告

ABSTRACT
Since the 1970s and 80s acoustic levitation techniques have primarily been applied by NASA and ESA to trap and navigate otherwise uncontrollable samples in microgravity. In the last two decades the same methods have also been used as a means of containerless manipulation on Earth. Numerous experiments have been performed in a vast spectrum of research areas, including fluid dynamics, analytical chemistry, atmospheric sciences, molecular biology, and most recently tabletop astrophysics.In Force Field, acoustically levitated water droplets resonate, vaporise and reassemble into spheroids, toroids and oscillating polygons while spinning nearly devoid of shear. The performance simultaneously taps into the 3-dimensionality of sound, the elusive physicality of water, as well as the rotational dynamics of celestial and subatomic bodies.