A tunable acoustic jet from an ABS core-shell container filled with two incompatible liquids

Abstract Recently, sub-wavelength acoustic beams, called acoustic jets (AJs), have been presented. These AJs can be produced by thin hollow spherical container structures filled with liquids. Herein, we investigate a tunable AJ from an ABS core-shell container filled with two incompatible liquids using the finite element method. Firstly, the properties of the AJ produced by the ABS core-shell container filled with water and phenixin are studied. Then, the AJ can be tuned by changing the proportion of water and phenixin inside of the ABS core-shell container. During this process, it is found that the peak intensity and beam waist of the AJ can be changed and less than λ /3 acoustic beams can be obtained inside of the container when the proportion of water and phenixin is appropriately chosen. The acoustic resonance inside of the container is achieved by changing the proportion of water and phenixin. Finally, we present the influence of the container material structural loss on the characteristics of the AJs and acoustic resonance. Our results provide a method for tunable AJs, and obtain sub- λ /3 acoustic beams inside of the container. Moreover, acoustic resonance is firstly achieved using a container filled with two incompatible liquids.