非理想通道中的噪声转捩流动
Noisy Transitional Flows in Imperfect Channels
AI总结：
该研究利用壁面嵌入式微悬臂梁传感器测量两个名义相同但缺陷不同的毫米级通道，发现近壁脉动高阶矩差异巨大，而最低阶统计量相似，并可用噪声 Landau 方程解释不同噪声源导致的相似转捩行为。
摘要：
本文研究非理想毫米级通道中的噪声转捩流动。为探测这些流动，我们使用嵌入通道壁内的微悬臂梁传感器。我们在两个名义上完全相同的通道中开展实验。两个通道中不同的缺陷集合导致了两种随机流动，其中近壁脉动的高阶矩相差数个数量级。然而令人惊讶的是，两种情况下的最低阶统计量在定性上看起来相似，并且可以用所提出的慢模噪声 Landau 方程来描述。无论噪声来源如何，噪声都会正则化弛豫时间的 Landau 奇点，并使由不同噪声源驱动的转捩表现出相似性。
英文摘要：
Here, we study noisy transitional flows in imperfect millimeter-scale channels. For probing the flows, we use microcantilever sensors embedded in the channel walls. We perform experiments in two nominally identical channels. The different set of imperfections in the two channels result in two random flows in which high-order moments of near-wall fluctuations differ by orders of magnitude. Surprisingly however, the lowest order statistics in both cases appear qualitatively similar and can be described by a proposed noisy Landau equation for a slow mode. The noise, regardless of its origin, regularizes the Landau singularity of the relaxation time and makes transitions driven by different noise sources appear similar.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
