Fast 1D NMR imaging of clay sedimentation using a multi-slice stepper motor method

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL Experiments in Fluids Pub Date : 2024-12-23 DOI:10.1007/s00348-024-03937-3

Nick J. Hol, Leo Pel, Martijn Kurvers, Claire Chassagne

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Abstract

This study introduces a fast 1D nuclear magnetic resonance (NMR) imaging method based on multi-slice imaging with a stepper motor to study sedimentation dynamics of clayey soils. Traditional NMR is limited by long acquisition times due to water’s T₁ relaxation time. Our approach combines multi-slice imaging with a stepper motor and frequency-based selection, reducing measurement time while maintaining sub-millimeter resolution, at the same time overcoming the limitations by the slow relaxation of water. This nondestructive method provides detailed insights into the sedimentation and consolidation of suspensions, including pore size distribution and density profiles within a single measurement. The technique is demonstrated with kaolinite clay suspensions, highlighting the technique’s ability to capture the dynamics of gravity-driven systems rapidly and accurately, even for fast-sedimenting soils such as kaolinite in the first hours of sedimentation. This advancement is valuable for geotechnical and environmental applications where understanding sedimentation is crucial.

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采用多片步进电机方法的粘土沉降快速一维核磁共振成像

介绍了一种基于步进电机多层成像的快速一维核磁共振成像方法，用于研究粘性土的沉降动力学。由于水的T1弛豫时间，传统的核磁共振受制于较长的采集时间。我们的方法将多层成像与步进电机和基于频率的选择相结合，在保持亚毫米分辨率的同时减少了测量时间，同时克服了水缓慢松弛的限制。这种非破坏性方法提供了对悬浮液沉积和固结的详细了解，包括单次测量中的孔径分布和密度分布。该技术在高岭石粘土悬浮液中得到了验证，突出了该技术快速准确地捕获重力驱动系统动力学的能力，即使是在沉积的最初几个小时内，高岭石等快速沉积的土壤也是如此。这一进展对了解沉积至关重要的岩土工程和环境应用具有重要价值。图形抽象

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来源期刊

Experiments in Fluids 工程技术-工程：机械

CiteScore

5.10

自引率

12.50%

发文量

157

审稿时长

3.8 months

期刊介绍： Experiments in Fluids examines the advancement, extension, and improvement of new techniques of flow measurement. The journal also publishes contributions that employ existing experimental techniques to gain an understanding of the underlying flow physics in the areas of turbulence, aerodynamics, hydrodynamics, convective heat transfer, combustion, turbomachinery, multi-phase flows, and chemical, biological and geological flows. In addition, readers will find papers that report on investigations combining experimental and analytical/numerical approaches.