Subsurface coherent structures and surface temperatures are investigated using simultaneous measurements of particle image velocimetry (PIV) and infrared (IR) thermography. Results for coherent structures from acoustic streaming and associated heating transfer in a rectangular tank with an acoustic horn mounted horizontally at the sidewall are presented. An observed vortex pair develops and propagates in the direction along the centerline of the horn. From the PIV velocity field data, distinct kinematic regions are found with the Lagrangian coherent structure (LCS) method. The implications of this analysis with respect to heat transfer and related sonochemical applications are discussed.

中文翻译：

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应用于声流流动的同步粒子图像测速和红外热成像技术

使用粒子图像测速 (PIV) 和红外 (IR) 热成像的同时测量来研究地下相干结构和表面温度。介绍了来自声流和相关热传递的相干结构的结果，该矩形储罐在侧壁上水平安装了一个声喇叭。观察到的涡旋对沿喇叭中心线的方向发展和传播。从 PIV 速度场数据中，使用拉格朗日相干结构 (LCS) 方法发现了不同的运动区域。讨论了这种分析对传热和相关声化学应用的影响。