个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:能源与动力学院
学科:能源与环境工程
办公地点:能动大楼810
联系方式:songyc@dlut.edu.cn
电子邮箱:songyc@dlut.edu.cn
Experiment Study on Temperature Distribution in Water-Saturated Porous Media
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论文类型:期刊论文
发表时间:2015-07-01
发表刊物:APPLIED MAGNETIC RESONANCE
收录刊物:SCIE、EI、Scopus
卷号:46
期号:7
页面范围:793-808
ISSN号:0937-9347
摘要:An attractive approach for magnetic resonance imaging (MRI) thermograph has been used to investigate temperature distribution in water-saturated porous media (silica gel). Linear relationships between several temperature-sensitive MRI parameters (longitudinal relaxation time T (1), self-diffusion coefficient D) and temperature (T) are dependent on water saturation in pore-throat structure of the porous media. Based on the linear relationships, the parameters including T (1) and D were evaluated using T (1)-weighted spin echo (SE) sequences and diffusion-weighted SE sequences, respectively, to measure temperature distribution by two-point method. In this work, we conducted calibration experiments to get the T (1)-T relationship and D-T relationship, which were then validated by cooling experiments. In the calibration experiment, the determination coefficients for the sample using T (1) and self-diffusion coefficient methods are close to 1 in the temperature range from 0 to 60 A degrees C, although T (1) method is difficult for the nonlinear relationship between signal intensity (SI) and T (1).