3D structure design and simulation for efficient particles capture: The influence of nanofiber diameter and distribution

Software simulation is a convenient and efficient way to design and check different air filter structures with high efficiency and low pressure drop. In this work, nanofiber filters of different diameters ranging from 100 to 900 nm were designed to check their influence on filtration efficiency, pressure drop and quality factor (QF). Slip-flow effect of air molecules was considered on the surface of single fiber. Then, filters with different diameter distributions were constructed to study the filtration efficiency discrepancy when the filter thickness and porosity were kept equal. With a rotation of the filters composed of nanofibers of 500 nm in diameter in the computational domain, the filtration efficiency and QF increased steadily. The simulation results were partially verified by electrospun cellulose acetate nanofiber filter, and meanwhile provide with new insights into the filter structure design of high filtration efficiency with low pressure drop.

软件仿真是一种高效，低压降设计和检查不同空气过滤器结构的便捷高效的方法。 在这项工作中，设计了直径范围从100到900 nm的纳米纤维过滤器，以检查它们对过滤效率，压降和品质因数（QF）的影响。 在单纤维的表面上考虑了空气分子的滑流效应。 然后，构造具有不同直径分布的过滤器，以研究当过滤器厚度和孔隙率保持相等时的过滤效率差异。 通过在计算域中旋转由直径为500 nm的纳米纤维组成的过滤器，过滤效率和QF稳步提高。 通过静电纺丝醋酸纤维素纳米纤维过滤器对仿真结果进行了部分验证，同时为高过滤效率和低压降的过滤器结构设计提供了新的见解。

Journal ：MATERIALS TODAY COMMUNICATIONS

Impact Factor：2678

Paper link: https://www.sciencedirect.com/science/article/abs/pii/S2352492819314618