Conditions of Pressure Wave Focusing in a Bubbly Wedge

Focusing of a compression waves in a toroidal bubble cluster

“…The acoustic hardness of a bubble cluster is less than the acoustic hardness of water, so the initial boundary wave from the cluster will be reflected as from a free boundary [9] (figure 2, a). Over time, due to the two-dimensional wave motion, oscillations change in the region of a highly compressible bubbly liquid [3,4]. Focusing is accompanied by ugly wave bursts (figure 2,b and 2,c).…”

“…It is shown that, depending on the time length of the increased pulse inside the curtain, it may be necessary to increase the pressure value more than the value of the initial signal. The study of the dynamics of compression waves in a flat is devoted to the work [4]. In [5] numerically studied of the "pumping" of a spherical bubble.…”