A novel method for rapid evaluating the characteristics of fluid and solute transport in membrane devices
A novel method for rapid evaluating the characteristics of fluid and solute transport in membrane devices
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一种快速评估膜装置中流体和溶质传输特性的新方法
DOI：
10.1016/j.icheatmasstransfer.2021.105198
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发表时间：
2021-02-21
影响因子：
7
通讯作者：
Liang，Xin M.
中科院分区：
文献类型：
--
作者：
Zhou，Xiaoming;Liu，Jie;Liang，Xin M.
对于膜装置的优化设计和应用，仔细考虑潜在的传质机制的复杂性以及装置性能对设计参数和操作条件的依赖性是至关重要的。在这项研究中，我们提出了一个新的一维模型，这是简单的，但占的主要现象，可能会影响膜装置的传质特性。随后提出了一种新的数值方法来计算输运方程。与传统方法不同，在传统方法中，不同子域的输运方程，即，该方法将整个装置中的流体和溶质输运视为连通的流动网络，并根据基尔霍夫定律推导出控制方程的离散形式。通过以耦合隐式方式计算方程，可以获得具有改进的数值稳定性、精度和效率的全场解。通过对不同膜装置的实验数据验证了该方法的优越性。该方法能够方便、准确地评价各种条件下的传质特性，为筛选最佳设计参数和操作条件提供了一种有效的工具。
For the optimized design and application of membrane devices, careful consideration of the complexity of the underlying mass transport mechanism as well as the dependence of device performance on design parameters and operation conditions is critical. In this study, we present a new one-dimensional model, which is straightforward and yet accounts for the major phenomena that could impact the mass transport characteristics of membrane devices. A novel numerical method is subsequently presented to calculate the transport equations. Unlike the conventional method where transport equations for different subdomains, i.e., membrane and the side compartments, are calculated in separated steps and requires repeated iteration to achieve convergence, the presented method treats fluid and solute transport in the whole device as connected flow networks, and deduces the discrete forms of governing equations through Kirchhoff's Laws. By calculating the equations in a coupled implicit manner, whole-field solution can be obtained with improved numerical stability, accuracy, and efficiency. The superiority of the method have been validated by experimental data with respect to different membrane devices. Capable of readily and accurately evaluating their mass transport characteristics under various conditions, the presented method provides an efficient tool for screening the optimal design parameters and operation conditions.