Using X-ray computed tomography in hydrology: systems, resolutions, and limitations
Using X-ray computed tomography in hydrology: systems, resolutions, and limitations
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DOI：
10.1016/s0022-1694(02)00157-9
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发表时间：
2002-10-15
影响因子：
6.4
通讯作者：
Christensen, BSB
中科院分区：
文献类型：
--
作者：
Wildenschild, D;Hopmans, JW;Christensen, BSB
结合实验技术和数学分析的进步，使得有可能使用非破坏性X射线计算机断层扫描（CT）来表征多孔介质中的相分布和孔隙几何形状。我们提出了定性和定量的CT结果部分饱和的介质，获得不同的扫描系统和样本大小，以说明这些不同的系统，包括空间分辨率和对比度的主题的优点和局限性。此外，我们目前的例子，我们最近的三维高分辨率图像，它是可能的，以解决个别孔隙和划定空气-水界面接触。这种解决方案提供了一个新的机会，遵循动态流动行为的孔隙尺度，并验证新的理论和数值模拟方法。(C)2002爱思唯尔科技有限公司版权所有。
A combination of advances in experimental techniques and mathematical analysis has made it possible to characterize phase distribution and pore geometry in porous media using non-destructive X-ray computed tomography (CT). We present qualitative and quantitative CT results for partially saturated media, obtained with different scanning systems and sample sizes, to illustrate advantages and limitations of these various systems, including topics of spatial resolution and contrast. In addition, we present examples of our most recent three-dimensional high-resolution images, for which it was possible to resolve individual pores and to delineate air-water interfacial contacts. This kind of resolution provides a novel opportunity to follow the dynamic flow behavior on the pore scale and to verify new theoretical and numerical modeling approaches. (C) 2002 Elsevier Science Ltd. All rights reserved.