二维通道内的外流
Outer streaming within a two-dimensional channel
摘要：
声流是由振荡流中的非线性引起的净时均流。广泛的研究试图识别各种几何形状的系统中的声流的不同物理机制和类型。虽然在一个通道中的流保持一个最简单的几何形状，量纲分析的控制方程揭示了多个政权的流可能发生在一个通道内。在这项研究中，开发了一个框架，用于调查和理解的物理流制度在一个二维通道。通过采取不同的限制的无量纲数比发现的框架内，流模型在以前的作品中得到恢复，以证明不同的流制度内的通道。快速流的发病，然后分析的框架和非线性雷诺数，这表明是否流是慢或快，被发现为不同的物理流制度。因此，该框架为分析通道中的快速流媒体和多尺度系统中的流媒体提供了基础，同时将之前的流媒体模型组织到通道几何形状的物理频谱中。
英文摘要：
Acoustic streaming is the net time-averaged flow that results from the nonlinearities in an oscillating flow. Extensive research has sought to identify different physical mechanisms and types of acoustic streaming in systems of various geometries. While streaming in a channel maintains one of the simplest geometries, dimensional analysis of the governing equations reveals that multiple regimes of streaming may occur within a channel. In this study, a framework is developed for investigating and understanding the physical streaming regimes in a two-dimensional channel. By taking different limits of the dimensionless number ratios found within the framework, streaming models derived in previous works are recovered to demonstrate the different streaming regimes within a channel. The onset of fast streaming is then analyzed with the framework and nonlinear Reynolds numbers, which indicate whether the streaming is slow or fast, are found for the different physical streaming regimes. As a result, the framework provides a base for analyzing fast streaming in a channel and streaming in multi-scale systems while organizing previous streaming models into a physical spectrum for a channel geometry.
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