Real-time fluid transport characterization through direct acquisition of the averaged propagator.
Real-time fluid transport characterization through direct acquisition of the averaged propagator.
复制标题
通过直接采集平均传播器来表征实时流体传输。
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
P. Galvosas
中科院分区：
文献类型：
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作者：
W. Kittler;M. Hunter;P. Galvosas
布朗运动（扩散）和相干流是许多自然和人工过程的基础。因此，它的精确测量和描述在科学、工程和技术的许多领域是非常需要的。目前可用的方法通常涉及多次实验和对获得的数据进行大量处理。这一贡献提出了一个理论和实验框架，使人们能够通过获取所谓的平均传播子直接检查受扩散和流动影响的流体物质动力学。这个统计函数保存了所有关于颗粒迁移率的信息，这些信息是由于流动和扩散在观察到的流体上的平均值。该方法基于单个瞬时核磁共振测量事件。它还消除了数据后处理的需要，通过捕获平均传播器直接作为采集的信号，这使得实时监测扩散和流动。
Brownian motion (diffusion) and coherent flow are fundamental for many natural and artificial processes. Therefore, its accurate measurement and description is highly desirable in many areas of science, engineering, and technology. Currently available methods commonly involve multiple experiments and substantial processing of acquired data. This contribution proposes a theoretical and experimental framework that enables one to directly examine the dynamics of fluid matter subject to diffusion and flow through the acquisition of the so-called averaged propagator. This statistical function holds all information on particle mobility due to flow and diffusion averaged over the observed fluid. The proposed method is based on a single instantaneous nuclear magnetic resonance measurement event. It also removes the need for data postprocessing by capturing the averaged propagator directly as the acquired signal, which enables the monitoring of diffusion and flow in real time.