Modeling and design optimization for pleated membrane filters
Modeling and design optimization for pleated membrane filters
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DOI：
10.1103/physrevfluids.5.044306
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发表时间：
2020-04-27
影响因子：
2.7
通讯作者：
Cummings, Linda J.
中科院分区：
文献类型：
--
作者：
Sun, Yixuan;Sanaei, Pejman;Cummings, Linda J.
折叠式薄膜过滤器比非折叠式薄膜过滤器具有更大的表面积与体积比，可用于多种应用。然而，褶皱过滤器的性能（以通量-吞吐量图为特征）表明，等效的无褶皱过滤器在相同压降下可提供更好的性能。早期工作 [Sanaei、Richardson、Witelski 和 Cummings，J. Fluid Mech。 795, 36 (2016)] 使用高度简化的膜模型来研究打褶效应和膜几何形状如何影响这种性能差异。在这项工作中，我们扩展了这一研究方向，并使用渐近方法将褶皱结构内流动的外部问题与解释膜内孔隙结构的内部问题耦合起来。我们使用我们的模型来制定和解决给定过滤应用的最佳膜设计问题。
Pleated membrane filters, which offer larger surface area to volume ratios than unpleated membrane filters, are used in a wide variety of applications. However, the performance of the pleated filter, as characterized by a flux-throughput plot, indicates that the equivalent unpleated filter provides better performance under the same pressure drop. Earlier work [Sanaei, Richardson, Witelski, and Cummings, J. Fluid Mech. 795, 36 (2016)] used a highly simplified membrane model to investigate how the pleating effect and membrane geometry affect this performance differential. In this work, we extend this line of investigation and use asymptotic methods to couple an outer problem for the flow within the pleated structure to an inner problem that accounts for the pore structure within the membrane. We use our model to formulate and address questions of optimal membrane design for a given filtration application.