饱和介质中重非水相液体运移的数值模拟及敏感性分析*

南京大学学报(自然科学版) ›› 2011, Vol. 47 ›› Issue (3): 299–307.

饱和介质中重非水相液体运移的数值模拟及敏感性分析*

施小清 1 ** , 吴吉春 1 , 刘德朋 2 , 江思泯 3 , 孙媛媛 1 , 徐红霞 1

出版日期:2015-04-10 发布日期:2015-04-10
作者简介: ( 1. 污染控制与资源化研究国家重点实验室, 南京大学地球科学与工程学院水科学系, 南京, 210093;
2. 江苏省有色金属华东地质勘察局, 南京, 210007; 3. 同济大学水利工程系, 上海, 200092)
基金资助:
国家自然科学基金 ( 40702037, 40725010, 41030746) , 污染控制与资源化研究国家重点实验室开放基金
( PCRRF09015)

Numerical simulation of transportation of dense nonaqueous phase liquids in the subsurface environment

Shi X iao Qing 1 , Wu Ji Chun 1 , Liu De Peng 2 , J iang Si?Min 3 , Sun Yuan Yuan 1 , Xu H ong Xia 1

Online:2015-04-10 Published:2015-04-10
About author: ( 1. State Key Laboratory of Pollution Control and Resource Reuse, Department of Hydrosciences,
School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210093, China;
2. East China Mineral Exploration and Development Bureau, Nanjing, 210007, China;
3. Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China)

摘要/Abstract

摘要： 采用 T 2VOC 程序对重非水相液体( DNAPLs)在饱和介质中的迁移和分布特征进行了数值模拟. 以一个夹粘土透镜体的砂层介质为例, 采用三相毛管压力函数 Parker 模型和二相毛管压力 van
Genuchten 函数, 对比细透镜体对重非水相液体运移的影响. 进而探讨分析了三相毛管压力函数模型参数的敏感性. 研究结果表明毛管压力函数的不同会影响 DNAPLs 的运移, Parker 模型较 van Genuchten
模型所反映出介质对 DNAPLs 的阻滞和滞留作用更强. 进气压力对非均质介质中 DNAPLs 入渗分布的饱和度将有显著的影响. 对 Parker 模型中的 αnw 、 n 以及孔隙度和饱和渗透率的敏感性分析对比发现, 敏
感性程度的高低顺序依次是孔隙度> n> 饱和渗透率> α nw .

Abstract: This paper uses T2VOC code to simulate transportation of dense nonaqueous phase liquids (DNAPLs) in a saturated porous media. We take clay lenses embedded in a sand media as an example to compare the effects of clay
lenses to DNAPLs transportation using the three-phase model of capillary pressure function ( Parker model) or the two-phase van Genuchten function. Then we analyze the sensitivities of the parameters in the Parker model, in an
attempt to reveal the most sensitive parameters controlling the transportations of DNAPLs. Our results show thatdifferent capillary pressure function affects the DNAPLs migration. The porous media arrests and blocks more
DNAPLs when using the Parker model. The inlet pressure has a significant impact on the DNAPLs saturation in a heterogenous media. T he sensitivity analysis shows the importance of the four parameters in the order is porosity>
n> absolute permeability> αnw

施小清 1 ** , 吴吉春 1 , 刘德朋 2 , 江思泯 3 , 孙媛媛 1 , 徐红霞 1
. 饱和介质中重非水相液体运移的数值模拟及敏感性分析*
[J]. 南京大学学报(自然科学版), 2011, 47(3): 299–307.

Shi X iao Qing 1 , Wu Ji Chun 1 , Liu De Peng 2 , J iang Si?Min 3 , Sun Yuan Yuan 1 , Xu H ong Xia 1
. Numerical simulation of transportation of dense nonaqueous phase liquids in the subsurface environment
[J]. Journal of Nanjing University(Natural Sciences), 2011, 47(3): 299–307.

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