Version 1
: Received: 19 July 2020 / Approved: 20 July 2020 / Online: 20 July 2020 (11:28:45 CEST)
How to cite:
Pan, Z.; Zhang, X.; Sun, Z.; Jiang, F.; Lin, L.; Liang, Y.; Tang, M.; Wang, J. High Fidelity Simulation of Ultrafine PM Filtration by Multiscale Fibrous Media Characterized by a Combination of X-Ray CT and FIB-SEM. Preprints2020, 2020070467
Pan, Z.; Zhang, X.; Sun, Z.; Jiang, F.; Lin, L.; Liang, Y.; Tang, M.; Wang, J. High Fidelity Simulation of Ultrafine PM Filtration by Multiscale Fibrous Media Characterized by a Combination of X-Ray CT and FIB-SEM. Preprints 2020, 2020070467
Pan, Z.; Zhang, X.; Sun, Z.; Jiang, F.; Lin, L.; Liang, Y.; Tang, M.; Wang, J. High Fidelity Simulation of Ultrafine PM Filtration by Multiscale Fibrous Media Characterized by a Combination of X-Ray CT and FIB-SEM. Preprints2020, 2020070467
APA Style
Pan, Z., Zhang, X., Sun, Z., Jiang, F., Lin, L., Liang, Y., Tang, M., & Wang, J. (2020). High Fidelity Simulation of Ultrafine PM Filtration by Multiscale Fibrous Media Characterized by a Combination of X-Ray CT and FIB-SEM. Preprints. https://doi.org/
Chicago/Turabian Style
Pan, Z., Min Tang and Jing Wang. 2020 "High Fidelity Simulation of Ultrafine PM Filtration by Multiscale Fibrous Media Characterized by a Combination of X-Ray CT and FIB-SEM" Preprints. https://doi.org/
Abstract
Air filtration mechanisms in the composite filter media used in practical applications are important and challenging to understand because the component fibers could have various size scales and morphologies. In this work, a three-dimensional digital model of nanofiber-based filter media was reconstructed for the first time based on the X-ray tomography data for the cellulose substrate and the Focused Ion Beam-Scanning Electron Microscope (FIB-SEM) image analysis for the several microns thick (3.82-7.90 μm) electrospun polyvinylidene fluoride (PVDF) nanofiber membrane. Besides the high-resolution model where the details of the fibrous structures were fully resolved, another low-resolution model with approximated unresolved structures was also established. Filtration simulations utilizing these models were conducted considering the drag force, Brownian diffusion and aerodynamic slip. The simulated filtration efficiencies agreed well with the experiments for particles of 70-400 nm, including the most penetrating particle size (MPPS, 100-200 nm). Moreover, the structure-resolved models had higher accuracy but higher computational costs, while the unresolved simulations saved much running time but over-predicted the filtration efficiency, especially for smaller particles (<100 nm). Our study presents a comprehensive strategy for investigating the composite filter media with multiscale complex structures using a combination of advanced characterization technologies and modular simulation models.
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
