论文标题
在形状优化的通道中抑制声流的抑制
Suppression of acoustic streaming in shape-optimized channels
论文作者
论文摘要
声流是一种无处不在的现象，是由于振荡流体中时间平均的非线性动力学而产生的。在这项理论研究中，我们表明，在流体的主要区域中，通过优化其约束壁的形状可以通过两个数量级来抑制声流。值得注意的是，在这种形状优化的腔体中，声压没有抑制，悬浮颗粒上的声辐射力也不是。这种基本的见解可能会导致应用，例如NM大小颗粒的声学处理，否则声学流却受到了损害。
Acoustic streaming is an ubiquitous phenomenon resulting from time-averaged nonlinear dynamics in oscillating fluids. In this theoretical study, we show that acoustic streaming can be suppressed by two orders of magnitude in major regions of a fluid by optimizing the shape of its confining walls. Remarkably, the acoustic pressure is not suppressed in this shape-optimized cavity, and neither is the acoustic radiation force on suspended particles. This basic insight may lead to applications, such as acoustophoretic handling of nm-sized particles, which is otherwise impaired by acoustic~streaming.
