3D air filtration modeling for nanofiber based filters in the ultrafine particle size range
3D air filtration modeling for nanofiber based filters in the ultrafine particle size range
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DOI：
10.1016/j.ces.2012.07.031
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发表时间：
2012-09-12
影响因子：
4.7
通讯作者：
Kimmer, Dusan
中科院分区：
文献类型：
--
作者：
Sambaer, Wannes;Zatloukal, Martin;Kimmer, Dusan
在这项工作中，提出了利用基于真实 SEM 图像的 3D 结构模型、过渡/自由分子流态、布朗扩散、颗粒-纤维相互作用、空气动力学滑移和筛子的 3D 过滤建模，并将其用于不同的基于聚氨酯纳米纤维的过滤器。为了模型验证的目的，将通过静电纺丝工艺制备的两层聚氨酯纳米纤维层（具有相同的平均纤维直径，120 nm，但不同的平均孔径）组合形成两对基于纳米纤维的过滤器；每对由两个具有相当的质量面积和厚度的过滤器组成。制备的过滤器的过滤特性在超细颗粒尺寸范围（20-400 nm）内通过实验确定。研究发现，所提出的模型能够合理预测所有测试过滤器样品的测量过滤效率、压降和品质因数。 (C) 2012 Elsevier Ltd. 保留所有权利。
In this work, 3D filtration modeling utilizing realistic SEM image-based 3D structure model, transition/free molecular flow regime, Brownian diffusion, particle-fiber interactions, aerodynamic slip and sieve has been proposed and used for different polyurethane nanofiber-based filters. For the model validation purposes, two polyurethane nanofiber layers prepared by the electrospinning process (having identical average fiber diameter, 120 nm, but different average pore sizes) were combined to form two pairs of nanofiber-based filters; each pair consists of two filters having comparable mass area and thickness. Filtration characteristics of prepared filters were determined experimentally in the ultrafine particle size range (20-400 nm). It has been found that the proposed model is able to reasonably predict the measured filtration efficiency, pressure drop and quality factor for all tested filter samples. (C) 2012 Elsevier Ltd. All rights reserved.