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首页> 外文期刊>Transport in Porous Media >Methods for Laser-Induced Fluorescence Imaging of Solute Plumes at the Darcy Scale in Quasi-Two-Dimensional, Refractive Index-Matched Porous Media
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Methods for Laser-Induced Fluorescence Imaging of Solute Plumes at the Darcy Scale in Quasi-Two-Dimensional, Refractive Index-Matched Porous Media

机译：在准二维折射率匹配多孔介质中达西规模的激光诱导的激光荧光成像的荧光成像

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摘要

A spectrum of environmental, industrial, and biomedical processes depends on solute plume spreading in laminar flows within porous media. The literature includes a number of approaches to model solute movement in this context, but fewer techniques are reported to measure it experimentally. To address this gap, this study describes novel experimental methods that permit measurement of solute plume spreading at the Darcy scale using laser-induced fluorescence in a 50 cm x 50 cm x 4 cm quasi-two-dimensional apparatus filled with refractive index-matched porous media. Fluorescence is provided by Rhodamine dye; refractive index matching is provided by borosilicate glass in glycerin. The depth-averaged porosity distribution of the porous media is determined using a novel optical method, whose results are used to investigate solute transport in two spatiotemporally varying flow fields, (1) a push-pull pumping sequence and (2) a sequence to induce stretching and folding of the solute plume. Quantitative analysis of replicate experiments reveals an extraordinary degree of reproducibility based on spatial moments, reactor ratio, and correlation coefficient.
机译：一系列环境，工业和生物医学方法取决于多孔介质内层流的溶质羽流。该文献包括在这种情况下模拟溶质运动的许多方法，但报告了更少的技术来实际测量它。为了解决这一差距，本研究描述了一种新的实验方法，允许使用激光诱导的荧光在50cm×50cm×4cm准二维设备中使用激光诱导荧光来测量达到达到达西级的溶质羽状散射率。填充有折射率匹配多孔的媒体。荧光由罗丹明染料提供;抗粘合剂匹配由甘油中的硼硅酸盐玻璃提供。使用新型光学方法测定多孔介质的深度平均孔隙率分布，其结果用于研究两种时尚变化的流场中的溶质转运，（1）推拉泵送序列和（2）序列诱导序列拉伸和折叠溶质羽毛。复制实验的定量分析基于空间矩，反应器比和相关系数揭示了非凡的再现性程度。

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