论文标题
3-d声波诱捕
3-D Acoustic Trapping With Standing Waves
论文作者
论文摘要
在这项工作中，我们将描述一个用于站立的实验设置 - 用于油中的空气微泡超声陷阱。我们使用角光谱技术开发了有限声学束的模型，并使用一般的Lorenz-Mie理论框架重建压力场，该框架使用有限元方法（FEM）模拟进行了验证。使用Stokes的阻力定律，我们能够获得被困气泡的半径，并估算捕获它们所需的最小声学力，范围为3 nn至780 nn。我们还将力剖面作为在实验中被捕获的不同气泡的距离的函数，并表明通过干扰无限平面波形成的驻波无法解释3-D中观察到的气泡在3-D中观察到的声学诱捕。
In this work, we will describe an experimental setup for a standing--wave ultrasound trap for air microbubbles in oil. We develop a model for the finite acoustic beam using the angular spectrum technique, and reconstruct the pressure field using the General Lorenz-Mie Theory framework, which was validated using a finite elements method (FEM) simulation. Using Stokes' drag law, we were able to obtain the radius of the trapped bubbles and estimate the minimum acoustic force necessary to trap them, which ranged from 3 nN to 780 nN. We also present the force profile as a function of distance for different bubble that were trapped experimentally, and show that a standing wave formed by interfering infinite plane waves cannot explain the observed acoustic trapping of bubbles in 3-D.
