Two‐dimensional modeling of flow and transport in the vadose zone with surfactant‐induced flow
Two‐dimensional modeling of flow and transport in the vadose zone with surfactant‐induced flow
复制标题
表面活性剂诱导流动渗流区流动和输运的二维建模
DOI：
10.1029/2001wr000674
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发表时间：
2002
影响因子：
5.4
通讯作者：
A. Warrick
中科院分区：
文献类型：
--
作者：
E. J. Henry;James E. Smith;A. Warrick
表面活性溶质（表面活性剂）可以诱导包气带内的毛细压力梯度和水通量。常见的数值模型不考虑表面活性剂诱导的毛细管压力梯度对非饱和流动和运输的影响。我们修改了水饱和流动和运输模型HYDRUS-2D [ Simunek等人，1999年]，以纳入表面活性剂浓度依赖性变化对表面张力和粘度分别对保湿性和水力传导性的影响。通过模拟亨利和史密斯[2002]的二维表面活性剂渗透实验来测试该模型。该模型成功地捕获了与表面活性污染物羽流通过包气带的推进相关的主要过程，包括包气带的排水和与溶质前缘相关的毛细管边缘的凹陷。模拟还提供了对表面活性剂诱导流动的不寻常特征的洞察，例如与毛细边缘排水相关的表面活性剂溶液的向上流动。
Surface‐active solutes (surfactants) can induce capillary pressure gradients and water fluxes within the vadose zone. Common numerical models do not account for the effects of surfactant‐induced capillary pressure gradients on unsaturated flow and transport. We modified the variably saturated flow and transport model HYDRUS‐2D [ Simunek et al., 1999 ] to incorporate the effects of surfactant concentration‐dependent changes to surface tension and viscosity on moisture retention and hydraulic conductivity, respectively. The model was tested by simulating the two‐dimensional surfactant infiltration experiment of Henry and Smith [2002] . The model successfully captured the major processes associated with the advance of a surface‐active contaminant plume through the vadose zone, including drainage of the vadose zone and depression of the capillary fringe associated with the solute front. The simulations also provided insight into unusual features of surfactant‐induced flow such as the upward flow of surfactant solution that was associated with capillary fringe drainage.
影响因子：
3.6
作者：
Henry, EJ;Smith, JE
通讯作者：
Smith, JE