Modeling transient organic vapor transport in porous media with the dusty gas model
Modeling transient organic vapor transport in porous media with the dusty gas model
复制标题
使用含尘气体模型模拟多孔介质中的瞬态有机蒸气传输
DOI：
10.1016/s0309-1708(98)00011-6
复制
发表时间：
1998
影响因子：
4.7
通讯作者：
B. Sleep
中科院分区：
文献类型：
--
作者：
B. Sleep
将含尘气体模型本构关系引入多孔介质中三相多组分流动输运的数值模型。含尘气体模型正确地解释了多组分气体混合物中所有气相物种之间的相互作用。该模型还包括努森扩散，这在非常细的土壤中变得很重要。将含尘气体模型的结果与基于菲克定律的预测进行了比较。对于研究的情况下，菲克定律overpredicted有机化合物的通量率，效果变得更加明显的土壤的渗透性和克努森系数降低。增加水分含量也似乎增加了基于含尘气体模型和基于菲克定律的预测之间的差异。进行了假设的场尺度模拟，以显示多组分效应和努森扩散在桑迪土壤和粘土中的影响。结果表明，修复时间显着低估，如果菲克定律用于气相扩散。
The dusty gas model constitutive relationships were incorporated into a numerical model for three-phase, multicomponent flow and transport in porous media. The dusty gas model properly accounts for interactions between all gas-phase species in multicomponent gas mixtures. The model also included Knudsen diffusion, which becomes important in very fine grained soils. The dusty gas model results were compared to predictions based on Fick's law. For the cases studied, Fick's law overpredicted flux rates of organic compounds, the effect becoming more pronounced as the permeability of the soil and the Knudsen coefficient were reduced. Increasing moisture content also appeared to increase the difference between predictions based on the dusty gas model and those based on Fick's law. Hypothetical field-scale simulations were performed to show the impact of multicomponent effects and Knudsen diffusion in a sandy soil and in a clay soil. Results showed that remediation times were significantly underpredicted if Fick's law was used for gas-phase diffusion.
影响因子：
5.4
作者：
R. Falta;I. Javandel;K. Pruess;P. Witherspoon
通讯作者：
R. Falta;I. Javandel;K. Pruess;P. Witherspoon