Analysis of the Tracer Diffusion Phenomena through Cracks in the Porous Media by Means of X-Ray CT
Analysis of the Tracer Diffusion Phenomena through Cracks in the Porous Media by Means of X-Ray CT
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DOI：
10.4236/msa.2013.48a003
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发表时间：
2013-08
期刊：
影响因子：
--
通讯作者：
A. Sato
中科院分区：
文献类型：
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作者：
A. Sato
利用X射线CT图像数据对污染物质在多孔岩体中的运移过程进行了可视化分析。在这项研究中，Kimachi砂岩，其中有大约26%的孔隙度，被用作岩石样品。这里分析了扩散现象的两种情况。一种是溶质从裂隙面扩散到多孔岩体中的情况，模拟了岩体的污染过程;另一种是溶质从多孔岩体中扩散出来的情况，模拟了污染物质从高污染源扩散的过程。结果发现，扩散现象清楚地可视化的X射线CT方法。通过引入示踪剂密度增量系数α，使示踪剂密度的定量分析成为可能，并明确了示踪剂密度分布与裂缝开度、孔隙度分布的关系。
The migration process of contamination materials in the porous rock mass was visualized and analyzed by X-ray CT image data. In this study, Kimachi sandstone, which had approximately 26% porosity, was used as a rock sample. Here two cases of diffusion phenomena were analyzed. One is the case that solute diffuses into the porous rock mass from the crack surfaces, and it simulates the contamination process of rock mass. Another is the case that the solute diffuses out of the porous rock mass, and it simulates the process that the contamination materials spread from highly contaminated sources. It was found that the diffusion phenomena were clearly visualized by X-ray CT method. By introducing the parameter, coefficient of tracer density increment α, quantitative analysis of tracer density became possible, and the relation between the density distribution of tracer and the crack apertures and the relation between the density distribution and porosity distribution became clear.