Date Published: May 29, 2015
Doctor Who’s most popular technology has taken one more step closer to being a reality. No, sorry, we don’t mean the TARDIS. But you are nearer than ever to getting your very own sonic screwdriver.
Researchers at the University of Bristol’s Department of Mechanical Engineering and Northwestern Polytechnical University in China have demonstrated how applying acoustic vortices as a ‘sonic tornado’ can make particles collect in the eye of the tiny storm. While small particles rotate slowly around the middle of the vortex, particles as large as household flour spin at high speeds, or move into a series of rings, stuck by the sonic forces.