论文标题
理想圆柱室中球体颗粒上的声辐射力和扭矩
Acoustic radiation force and torque on spheroidal particles in an ideal cylindrical chamber
论文作者
论文摘要
从理论上讲，我们研究了浸入理想圆柱体内部的非粘性流体中的小球粒子上的声辐射力和扭矩如何出现。理想的腔室包括硬顶和底部（刚性边界条件）以及柔软或硬侧壁。通过假设粒子比声学波长小得多，我们提出了由任意形状的声波引起的辐射力和扭矩的分析表达式。与以前的结果不同，这些表达式相对于固定实验室框架给出。展示了我们的模型，用于分析在半波长的大声室中伸长的金属微球（10：1纵横比）的行为，其直径为几毫米。结果表明，辐射扭矩沿节点平面对齐微球形，辐射力会引起翻译运动，速度最高为每秒一个体长。最后，我们讨论了这项研究对通过超声推动纳米棒的含义。
We theoretically investigate how the acoustic radiation force and torque arise on a small spheroidal particle immersed in a nonviscous fluid inside an ideal cylindrical chamber. The ideal chamber comprises a hard top and bottom (rigid boundary condition), and a soft or hard lateral wall. By assuming the particle is much smaller than the acoustic wavelength, we present analytical expressions of the radiation force and torque caused by an acoustic wave of arbitrary shape. Unlike previous results, these expressions are given relative to a fixed laboratory frame. Our model is showcased for analyzing the behavior of an elongated metallic microspheroid (with a 10 : 1 aspect ratio) in a half-wavelength acoustofluidic chamber with a few millimeters diameter. The results show the radiation torque aligns the microspheroid along the nodal plane, and the radiation force causes a translational motion with a speed of up to one body length per second. At last, we discuss the implications of this study to propelled nanorods by ultrasound.
