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Fundamental research for transport-diffusion of contaminants in the basement

地下室污染物传输扩散基础研究

基本信息

批准号：
14350536
负责人：
SUGAWARA Katsuhiko
金额：
$ 8.26万
依托单位：
Kumamoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350536/
关键词：
Transport-diffusion in the basement Contaminants Visualization X-ray CT Tracer Tracer X-ray CT method 造影剤トレーサー実験

项目摘要

This is the fundamental studies to make clear the transport-diffusion phenomena of contaminants in the basement. The characteristic point of this study is to utilize X-ray CT for industrial use is applied as a nondestructive visualization technique, and the establishment of the visualization and the evaluation method of the transport-diffusion phenomena have been investigated.Studies have been conducted according to the following 4 subjects. The results obtained in this project are follows.1)The tracer X-ray CT method to visualize transport-diffusion phenomena was established ahead of the world. That is, the new tracer, which viscosity is independent from the density, makes possible the clear visualization of the transport-diffusion field both in rocks and soils. Utilizing the obtained image data by the tracer X-ray CT method, the theory to analyze the velocity structure during transport-diffusion was also established.2)The fundamental experimental technique for the visualization of tr … More ansport-diffusion field and the method to analyze velocity structure by tracer X-ray CT method was developed. The new image processing technique was also developed, and the experimental evaluation method to determine physical parameters related to transport-diffusion, such as diffusion length, was established.3)In order to evaluate space distribution of pores from X-ray CT image data, applicability of kriging method was clarified. The structure dependency of transport-diffusion in a rock was also analyzed by applying the tracer X-ray CT method towards fully saturated porous sandstone and artificial porous materials which has 10 to 60% porosity. These results provided useful data to future studies of transportation-diffusion phenomena.4)2-D transport-diffusion FEM code which can consider the heterogeneity and the isotropy of materials was developed, and validity of the tracer X-ray CT method was confirmed by numerical analyses. These results provided fundamental necessary data to the error evaluation in the analysis of velocity structure based on the tracer X-ray CT method. Less

这是弄清污染物在地下室中迁移扩散现象的基础性研究。本研究的特点是将工业用X射线CT作为一种无损可视化技术，并对其可视化的建立和传输扩散现象的评价方法进行了研究。1)率先建立了示踪X射线CT显示输运-扩散现象的方法。也就是说，这种新的示踪剂，其粘度与密度无关，使得岩石和土壤中的迁移-扩散场的清晰可视化成为可能。利用示踪X射线CT方法获得的图像数据，建立了分析输运-扩散过程中速度结构的理论。2)建立了TR-…可视化的基本实验技术提出了用示踪X射线CT分析速度结构的方法。开发了新的图像处理技术，建立了确定扩散长度等与传输扩散相关的物理参数的实验评价方法。3)为了从X射线CT图像数据中评价孔隙的空间分布，阐明了克立格法的适用性。应用示踪X射线CT方法，对完全饱和的多孔砂岩和孔隙度为10%~60%的人工多孔材料，分析了岩石中输运-扩散的结构依赖性。4)建立了考虑材料非均质性和各向同性的二维输运扩散有限元程序，并通过数值分析验证了示踪X射线CT方法的有效性。这些结果为基于示踪X射线CT方法的速度结构分析的误差评定提供了必要的基础数据。较少