Second order and transverse flow visualization through three-dimensional particle image velocimetry in millimetric ducts

IF 2.8 2区工程技术 Q2 ENGINEERING, MECHANICAL Experimental Thermal and Fluid Science Pub Date : 2024-08-20 DOI:10.1016/j.expthermflusci.2024.111296

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Abstract

Despite recent advances in 3D particle image velocimetry (PIV), challenges remain in measuring small-scale 3D flows, in particular flows with large dynamic range. This study presents a scanning 3D-PIV system tailored for oscillatory flows, capable of resolving transverse flows less than a percent of the axial flow amplitude. The system was applied to visualize transverse flows in millimetric straight, toroidal, and twisted ducts. Two PIV analysis techniques, stroboscopic and semi-Lagrangian PIV, enable the quantification of net motion as well as time-resolved axial and transverse velocities. The experimental results closely align with computational fluid dynamics (CFD) simulations performed in a digitized representation of the experimental model. The proposed method allows the examination of periodic flows in systems down to microscopic scale and is particularly well-suited for applications that cannot be scaled up due to their complex, multi-physics nature.

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通过毫米管道中的三维粒子图像测速仪实现二阶和横向流动可视化

尽管三维粒子图像测速仪（PIV）取得了最新进展，但在测量小尺度三维流动，尤其是大动态范围流动方面仍存在挑战。本研究介绍了一种专为摆动流定制的扫描式三维粒子图像测速系统，该系统能够分辨小于轴向流振幅百分之一的横向流。该系统被用于观察毫米直管、环形管和扭曲管中的横向流动。通过频闪和半拉格朗日 PIV 两种 PIV 分析技术，可以量化净运动以及时间分辨的轴向和横向速度。实验结果与在实验模型的数字化表示中进行的计算流体动力学（CFD）模拟密切吻合。所提出的方法可以检查微观尺度下系统中的周期性流动，尤其适用于因其复杂性和多物理特性而无法放大的应用。

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来源期刊

Experimental Thermal and Fluid Science 工程技术-工程：机械

CiteScore

6.70

自引率

3.10%

发文量

159

审稿时长

34 days

期刊介绍： Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.