多孔材料锐界面弥散输运模型
A model of dispersive transport across sharp interfaces between porous materials
摘要：
最近的实验室实验中的复合多孔柱中的溶质迁移已经显示出不对称的流动方向，这是不能解释的，目前的运输范式反转后的溶质到达时间。在这项工作中，我们提出了一个定义的溶质通量通过尖锐的界面，并探讨了潜在的微观粒子动力学应用蒙特卡罗模拟。我们的结果与以前的实验结果是一致的，并解释了所观察到的传输不对称性。还提供了一个解释拟议的物理机制方面的通量整流。该方法是相当普遍的，并可以扩展到其他情况下，涉及运输跨越尖锐的接口。
英文摘要：
Recent laboratory experiments on solute migration in composite porous columns have shown an asymmetry in the solute arrival time upon reversal of the flow direction, which is not explained by current paradigms of transport. In this work, we propose a definition for the solute flux across sharp interfaces and explore the underlying microscopic particle dynamics by applying Monte Carlo simulation. Our results are consistent with previous experimental findings and explain the observed transport asymmetry. An interpretation of the proposed physical mechanism in terms of a flux rectification is also provided. The approach is quite general and can be extended to other situations involving transport across sharp interfaces.
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