Oscillation behavior of bubble pair in magnetic fluid tube under magneto-acoustic complex field

Based on the dynamic model of a single bubble in magnetic fluid tube, equation pair system magneto-acoustic field is established by introducing secondary sound radiation between bubbles and considering effect viscosity fluid. The effects intensity, pair’s size, interaction (including Bjerknes force <i>F</i><sub>B</sub> attraction <i>F</i><sub>m</sub>) characteristics vibration double are analyzed. results show that increases amplitude bubbles, influence large greater than small bubble. When center distance two constant relative size larger, or when surface small, stronger. In composite field, can affect <i>F</i><sub>B</sub>, <i>F</i><sub>m</sub>, pressure <i>P</i><sub>m</sub> resistance, degrees different. There competition <i>F</i><sub>m</sub> forces acting microbubble jointly movement bubbles. By studying behavior paired it provide theoretical basis for improving therapeutic targeted regulation microbubbles biological tissues adjusting practical application.