Self-motion of microparticles under acoustic pressure
摘要
The phenomenon of microparticle self-motion is utilized in targeted drug delivery and in advanced energy storage devices, including supercapacitors, batteries, and fuel cells. This self-motion can be induced by various methods, including acoustic pressure. We consider microparticles shaped as Helmholtz resonators subjected to ultrasound pressure. By controlling the direction and intensity of an ultrasonic plane wave, we regulate the velocity and trajectory of the microparticles. This paper presents both mathematical and numerical models for two types of microparticles: a sphere with a hole, and a hemisphere with a cone and a hole. We demonstrate that, in this model, the generated radiation force is sufficient to accelerate and guide these particles.