Author:
Tsai Shih-Pang,Wu Wei,Sota Hiroyoshi,Hirogaki Toshiki,Aoyama Eiichi, , ,
Abstract
Using computational fluid dynamics (CFD) technology, a stable manufacturing method for polymeric nanofiber non-woven fabrics based on an improved melt-blowing method and flash spinning is realized to achieve mass productivity. Subsequently, a method to predict filter efficiency using two production methods based on the effects of thickness, filling rate, and fiber diameter on filtration performance is developed to establish a filter design via CFD technology. CFD models featuring uniform fiber diameters are proposed. Next, the pressure loss and flow resistivity are calculated using CFD flow analysis software, as in a filter experiment. The proposed fiber diameter distribution model yields results similar to the experimental value, and the relationship among filling rate, fiber diameter, and flow resistivity is verified. The non-woven filter fabricated in this study demonstrates superior filtration properties, based on the results. Additionally, a method to satisfy both low pressure loss (low flow resistivity) and high filtration efficiency is discussed. Although the pressure loss increases, the filter yields a value below the standard for high-performance face masks, since the fiber diameter is on the nano-order.
Publisher
Fuji Technology Press Ltd.
Subject
Industrial and Manufacturing Engineering,Mechanical Engineering
Reference44 articles.
1. WHO Update on Coronavirus. https://covid19.who.int [Accessed April 10, 2022]
2. CDC Update on Coronavirus, 2021. https://www.cdc.gov/coronavirus/2019-nCoV/index.html [Accessed July 3, 2021]
3. S. A. Grayson, P. S. Griffiths, M. K. Perez, and G. Piedimonte, “Detection of airborne respiratory syncytial virus in a pediatric acute care clinic,” Pediatric Pulmonol., Vol.52, pp. 684-688, 2016.
4. L. Liu, J. Wei, Y. Li, and A. Ooi, “Evaporation and dispersion of respiratory droplets from coughing,” Indoor Air, Vol.27, pp. 179-190, 2016.
5. E. Y. C. Shiu, N. H. L. Leung, and B. J. Cowling, “Controversy around airborne versus droplet transmission of respiratory viruses: implication for infection prevention,” Current Opinion in Infectious Diseases, Vol.32, pp. 372-379, 2019.