论文标题
在任意地下水速度场上建模由于传质和物理异质性而引起的非叉质溶质传输
Modeling non-Fickian solute transport due to mass transfer and physical heterogeneity on arbitrary groundwater velocity fields
论文作者
论文摘要
我们提出了一种用于地下水传输建模的混合方法，即“ CTRW-A-Streamline”，该模型允许在大规模，明显限制的异质地下水速度场上进行连续的时空随机行走（CTRW）粒子跟踪。非叉式运输模型（在这种情况下为CTRW）与一般异质速度场的组合代表了当前最新的现状，在该状态下，非菲克运输模型或异质速度场被采用，但通常不两者兼而有之。我们提出了一种进行此粒子跟踪的一般方法，该方法完全分开了表征宏观流动，量表对流异质性和移动IMMOBILE质量传播的模型参数，从而可以直接从可用的数据中直接指定一个先验。该方法是形式化的，并与经典CTRW进行了连接，并进行了从属方法。提出了数值佐证。
We present a hybrid approach to groundwater transport modeling, "CTRW-on-a-streamline", that allows continuous-time random walk (CTRW) particle tracking on large-scale, explicitly-delineated heterogeneous groundwater velocity fields. The combination of a non-Fickian transport model (in this case, the CTRW) with general heterogeneous velocity fields represents an advance of the current state of the art, in which non-Fickian transport models or heterogeneous velocity fields are employed, but generally not both. We present a general method for doing this particle tracking that fully separates the model parameters characterizing macroscopic flow, subscale advective heterogeneity, and mobile-immobile mass transfer, such that each can be directly specified a priori from available data. The method is formalized and connections to classic CTRW and subordination approaches are made. Numerical corroboration is presented.
