Measurement in opaque flows: a review of measurement techniques for dispersed multiphase flows
Measurement in opaque flows: a review of measurement techniques for dispersed multiphase flows
复制标题
不透明流的测量：分散多相流测量技术综述
DOI：
10.1007/s00707-020-02683-x
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发表时间：
2020
期刊：
影响因子：
2.7
通讯作者：
C. Poelma
中科院分区：
文献类型：
--
作者：
C. Poelma
对表征分散多相流的测量技术进行了综述，这是传统光学技术无法实现的。简要讨论了限制光学技术准确性和有效性的主要问题：串扰、信噪比降低和（有偏差的）数据丢失。标准光学技术的扩展包括使用荧光示踪剂、折射率匹配、弹道成像、结构照明和光学相干断层扫描。作为第一种非光学技术，简要讨论了电容层析成像。虽然真正是非侵入性的，但它的分辨率较低。基于超声的技术已经从基于多普勒的分析快速发展到最近使用特征跟踪的 2D 方法。后者也适用于时间分辨流动研究。磁共振测速可以提供连续相的 3D 时间平均速度场。最后，X 射线成像被证明是量化局部气体分数的重要工具。虽然这些技术的影响力可能非常强大，但其影响将取决于流体力学而非临床成像采集和测量协议的开发。这需要系统的开发，并辅以仔细的验证实验。由于多相流的理论预测很少，因此制定标准化的“基准”流来进行验证非常重要。
A review is presented of measurement techniques to characterise dispersed multiphase flows, which are not accessible by means of conventional optical techniques. The main issues that limit the accuracy and effectiveness of optical techniques are briefly discussed: cross-talk, a reduced signal-to-noise ratio, and (biased) data drop-out. Extensions to the standard optical techniques include the use of fluorescent tracers, refractive index matching, ballistic imaging, structured illumination, and optical coherence tomography. As the first non-optical technique, a brief discussion of electrical capacitance tomography is given. While truly non-invasive, it suffers from a low resolving power. Ultrasound-based techniques have rapidly evolved from Doppler-based profiling to recent 2D approaches using feature tracking. The latter is also suitable for time-resolved flow studies. Magnetic resonance velocimetry can provide time-averaged velocity fields in 3D for the continuous phase. Finally, X-ray imaging is demonstrated to be an important tool to quantify local gas fractions. While potentially very powerful, the impact of the techniques will depend on the development of acquisition and measurement protocols for fluid mechanics, rather than for clinical imaging. This requires systematic development, aided by careful validation experiments. As theoretical predictions for multiphase flows are sparse, it is important to formulate standardised ‘benchmark’ flows to enable this validation.
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影响因子：
2.8
作者：
de Motta, J. C. Brandle;Costa, P.;Renon, N.
通讯作者：
Renon, N.
影响因子：
2.2
作者：
Gladden, Lynn F.;Sederman, Andrew J.
通讯作者：
Sederman, Andrew J.
影响因子：
4.2
作者：
G. Trahey;S. M. Hubbard;O. Ramm
通讯作者：
G. Trahey;S. M. Hubbard;O. Ramm
使用压缩传感 MRI 探索多相流中湍流的起源。
影响因子：
8.6
作者：
Tayler AB
通讯作者：
Tayler AB
影响因子：
2.4
作者：
D. Freudenhammer;E. Baum;B. Peterson;B. Böhm;B. Jung;S. Grundmann
通讯作者：
D. Freudenhammer;E. Baum;B. Peterson;B. Böhm;B. Jung;S. Grundmann