在空气-水双相细砂介质中浸泡过程的动态非平衡效应 (DNE) - - 一个实验室规模的实验研究
Yuhao Ai1, Lihua Yang2, Yijia Sun3
1School of Marine Sciences, Sun Yat-sen University, 135 Xin'gang RD.W., Guangzhou 510275, China.
Journal of contaminant hydrology
|September 7, 2025
概括
沉浸过程中的动态非平衡效应 (DNE) 具有延迟时间和动态压力变化的特点. 这些DNE与水和度及其变化率有很强的相关性,为过程分析提供了新的定量参数.
科学领域:
- 多相流在多孔介质中的多相流.
- 地质化学和环境科学
- 石油工程是石油工程中的一个.
背景情况:
- 动态非平衡效应 (DNE) 对于理解浸泡过程中在多孔介质中的流体流动至关重要.
- 之前的研究还没有完全阐明DNE的时间动态和支配因素.
研究的目的:
- 在沉浸过程中系统地调查DNE.
- 评估DNE发育与水和毛细血管压力变化之间的时间关系.
- 确定影响DNE大小的主导因素.
主要方法:
- 消除了信号漂移和对毛细血管压力和水和度的重力影响.
- 分析了事件的顺序,包括静态和动态毛细血管压力 (DPMAX) 之间的最大差异,最大水和变化率 (RSMAX),最小毛细血管压力 (PMIN) 和最大水和 (SMAX).
- 量化滞后时间 (Δt1, Δt2) 和动态系数 τ.
主要成果:
- 与DNE相关的事件 (DPMAX,RSMAX,PMIN,SMAX) 的序列因水和和化过程类型 (逐步或平稳) 而有所不同.
- 随着水和变化率的增加,滞后时间减少.
- 随着水和度的增加,DPMAX增加,而t降低.
- DNE大小与水和及其变化速度的相关性比毛细血管数量更强.
结论:
- 滞后时间 (Δt1, Δt2),DPMAX和 τ是用于在阶段性浸泡中表征DNE的关键定量参数.
- DNEs受到水和及其变化速度的显著影响.
- 这些发现提供了更详细的了解多孔介质流动中的动态效应.
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