模拟任意地下水速度场上由于质量传递和物理非均匀性引起的非Fickian溶质运移
Modeling non-Fickian solute transport due to mass transfer and physical heterogeneity on arbitrary groundwater velocity fields
摘要：
我们提出了一种混合的地下水输运建模方法，“CTRW上的流线”，允许连续时间随机游走（CTRW）粒子跟踪大规模，明确划定的非均质地下水速度场。非Fickian输运模型（在这种情况下，CTRW）与一般非均匀速度场的组合代表了现有技术的进步，其中采用非Fickian输运模型或非均匀速度场，但通常不是两者都采用。我们提出了一个通用的方法，这样做的粒子跟踪，完全分离的模型参数表征宏观流动，次尺度平流异质性，和移动-不移动的质量传递，使每个可以直接指定的先验从现有的数据。该方法是正式的，并连接到经典的CTRW和从属的方法。数值证实。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
