Modeling variability in porescale multiphase flow experiments
Modeling variability in porescale multiphase flow experiments
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DOI：
10.1016/j.advwatres.2017.04.005
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发表时间：
2017-07-01
影响因子：
4.7
通讯作者：
Tartakovsky, Alexandre M.
中科院分区：
文献类型：
--
作者：
Ling, Bowen;Bao, Jie;Tartakovsky, Alexandre M.
微流体装置和孔隙尺度数值模型通常用于研究生物、地质和工程多孔材料中的多相流。在这项工作中，我们在六个相同的微流控池中进行了一组排水和吸胀实验，以研究多相流实验的重现性。我们观察到显着变化的实验结果，这是较小的排水阶段和较大的吸胀阶段。我们证明，这些变化是由于微单元中的亚孔尺度几何形状差异（由于制造缺陷）和边界条件的变化（即，注射泵固有的注射速率的波动）。使用商业软件STAR-CCM+进行计算模拟，具有恒定和随机变化的注入速率。随机模拟能够捕获与变化的泵喷射速率相关联的实验中的可变性。(C)2017爱思唯尔有限公司出版
Microfluidic devices and porescale numerical models are commonly used to study multiphase flow in biological, geological, and engineered porous materials. In this work, we perform a set of drainage and imbibition experiments in six identical microfluidic cells to study the reproducibility of multiphase flow experiments. We observe significant variations in the experimental results, which are smaller during the drainage stage and larger during the imbibition stage. We demonstrate that these variations are due to sub-porescale geometry differences in microcells (because of manufacturing defects) and variations in the boundary condition (i.e., fluctuations in the injection rate inherent to syringe pumps). Computational simulations are conducted using commercial software STAR-CCM+, both with constant and randomly varying injection rates. Stochastic simulations are able to capture variability in the experiments associated with the varying pump injection rate. (C) 2017 Published by Elsevier Ltd.