Reproducible cavitation activity in water-particle suspensions.
A phenomenon named fluid focusing creates very fast liquid needle like flows from accelerated concave fluid interfaces. In this project, a shock-wave generator imposes this acceleration onto a liquid meniscus inside a capillary. Thereby, a liquid jet is generated which shoots up with more than 300km/h with a thickness of only a few micrometer. Using high-speed cameras, the motion of such liquid jets is being captured and studied upon. The idea behind this research is to use these thin liquid needles for drug delivery such as for vaccines. Yet the study is on the underlying physical principles. This paper explores the velocities and shapes of such jets and the subsequent motion of the concave fluid interfaces in order to determine more accurately the possible applications of such jets.