In a series of experiments replicating bubble blowing, NYU’s Applied Math Lab has discovered two ways in which bubbles are made: one, by quickly pushing soap film through a circular wand, which causes it to grow, and two, by pushing, at lower speeds, an already-slightly inflated soap film in order to drive additional inflation of the film and forming a bubble—an approach children are likely quite familiar with.

“This might explain how we often blow bubbles as kids: a quick puff bends the film outward and thereafter the film still inflates even as the flow of air slows,” says Leif Ristroph, an assistant professor at NYU’s Courant Institute of Mathematical Sciences and one of the researchers, referring to the second method.

свернуть