3D modeling of filtration process via polyurethane nanofiber based nonwoven filters prepared by electrospinning process
3D modeling of filtration process via polyurethane nanofiber based nonwoven filters prepared by electrospinning process
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DOI：
10.1016/j.ces.2010.10.035
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发表时间：
2011-02-15
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
对静电纺丝法制备的聚氨酯纳米纤维过滤器进行了低压下的全三维颗粒过滤模拟，考虑了滑移/过渡/自由分子流区、颗粒-纤维相互作用、空气/颗粒滑移、筛网和均匀流场，并将理论预测的过滤效率与相应的实验数据进行了比较。此外，还详细研究了风速、粘度、温度、压力和颗粒-纤维摩擦系数对所制得的聚氨酯纳米纤维过滤效率的影响。为了考虑纳米纤维滤光片的所有真实结构特征(如纤维直径的变化、长度方向的曲率、不均匀和垫层缺陷)，提出并利用了一种由相应的扫描电子显微镜图像构建三维纳米纤维垫层模型的新方法。(C)2010爱思唯尔有限公司。保留所有权利。
Full 3D particle filtration modeling at low pressures considering slip/transition/free molecular flow regime, particle-fiber interactions, air/particle slip, sieve and homogenous flow field has been performed for the polyurethane nanofiber filter prepared by electrospinning process and the obtained theoretical predictions for the filtration efficiency have been compared with the corresponding experimental data. Moreover, the effect of air velocity, viscosity, temperature, pressure and particle-fiber friction coefficient on the produced polyurethane nanofiber filter efficiency has been investigated in more details. In order to take all real structure features of the nanofiber filter into account (such as varying fiber diameter, curvature along its length, inhomogeneity and mat defects), a new approach for 3D nanofiber mat model construction from corresponding SEM images has been proposed and utilized. (c) 2010 Elsevier Ltd. All rights reserved.