多孔介质毛细压力-饱和度的滞后特性

被引:3
作者
胡雪蛟
杜建华
周磊
雷树业
刘翔
机构
[1] 清华大学工程热物理研究所,清华大学工程热物理研究所,清华大学工程热物理研究所,清华大学工程热物理研究所,清华大学工程热物理研究所北京,北京,北京,北京,北京
关键词
毛细滞后; 毛细压力; 饱和度; 突破效应; 多孔介质;
D O I
暂无
中图分类号
P642.26 [地面沉降];
学科分类号
0814 ;
摘要
通过对5种不同窄筛分沙样进行吸湿-排湿实验,获得了两种不同湿迁移途径下的毛细压力-饱和度关系曲线。结果表明,吸湿-排湿过程有明显的毛细滞后存在,而且沙样的粒径愈小,滞后效应的影响愈显著。传统的实验数据处理方法使用Leverett-Udell方程进行数据关联,由于J函数忽略了毛细滞后的影响,方法并不十分有效。使用突破压力和恢复压力作为能够表征滞后特性的特征压力,并对吸湿及排湿过程分别按实验数据拟合形状函数,结果表明,能更好地关联实验数据及拟合吸湿-排湿曲线。
引用
收藏
页码:91 / 96
页数:6
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