On the Importance of Hysteresis in Numerical Modeling of Surfactant-Induced Unsaturated Flow
On the Importance of Hysteresis in Numerical Modeling of Surfactant-Induced Unsaturated Flow
复制标题
论滞后现象在表面活性剂引起的不饱和流动数值模拟中的重要性
DOI：
10.1080/15320380902772638
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
D. Stolle
中科院分区：
文献类型：
--
作者：
R. Bashir;J. E. Smith;E. J. Henry;D. Stolle
众所周知，由于毛细压力对表面张力的依赖性，表面活性剂可以在非饱和多孔介质中诱导流动。在具有表面活性剂诱导流动的系统中，通常观察到的特征是在单调流动条件下与表面活性剂溶质前沿的传播相关的瞬态润湿/干燥/润湿序列。先前对在相对复杂（例如，二维体系）没有成功地结合滞后保湿性能。在这项研究中，滞后，二维模拟表面诱导流进行评估的潜在重要性，考虑滞后在这样的模拟。滞后模拟结果进行了比较，实验数据和非滞后模拟。结果表明，在数值模拟中加入滞后效应可以改善表面诱导非饱和流系统的模拟结果与实验结果之间的匹配。此外，包括滞后在数值模拟中发挥了重要作用，在预测污染物的分布和正确的压头/湿度条件下，在实验结束。
It is known that surfactants can induce flow in unsaturated porous media due to the dependence of capillary pressure on surface tension. A commonly observed feature in systems with surfactant-induced flow is a transient wetting/drying/wetting sequence associated with the propagation of a surfactant solute front under monotonic flow conditions. Previous efforts to model surfactant-induced flow in relatively complex (e.g., two-dimensional systems) have not successfully incorporated hysteretic moisture retention properties. In this research, hysteretic, two-dimensional simulations of surfactant-induced flow were performed to assess the potential importance of considering hysteresis in such simulations. Hysteretic simulation results were compared to experimental data and to non-hysteretic simulations. The results suggest that the inclusion of hysteresis in numerical simulations can improve the match between simulated and experimental results in systems with surfactant-induced unsaturated flow. Furthermore, the inclusion of hysteresis in numerical simulations played a significant role in predicting the distribution of the contaminant and correct pressure head/moisture condition at the end of the experiment.
影响因子：
3.6
作者：
Henry, EJ;Smith, JE
通讯作者：
Smith, JE