Assessment and design of filters and masks against COVID-19 via modeling and simulations.
This study aimed to evaluate and design masks against viruses, especially SARS-CoV-2 associated with COVID-19. A continuum filtration model was developed where the rate of particle deposition and "sticking" on the filter fibers is a critical term in the mass transfer, together with permeation veloci...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 21; no. 8; pp. 576 - 591 |
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| Autores principales: | , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Aug2024
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=178971634&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 178971634 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Aug2024 vid: 21 iid: 8 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 178971634 178971634 178971634 10.1080/15459624.2024.2357089 178971634 ppf: 576 ppct: 15 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Assessment and design of filters and masks against COVID-19 via modeling and simulations. aug: au: Zhang, Lydia Alshaikh, Mohamed K. Lekakou, Constantina affil: School of Mechanical Engineering Sciences, University of Surrey, Guildford, UK sug: subj: COVID-19 Prevention and Control Air Filters Standards Masks Standards Equipment Design Standards Simulations Occupational Health Evaluation Occupational Safety Evaluation Product Evaluation Human N95 Respirators Standards Particulate Matter Permeability Materials Testing ab: This study aimed to evaluate and design masks against viruses, especially SARS-CoV-2 associated with COVID-19. A continuum filtration model was developed where the rate of particle deposition and "sticking" on the filter fibers is a critical term in the mass transfer, together with permeation velocity, filter porosity, tortuosity, and Brownian diffusion. CFD simulations of the airflow during respiration lead to the recommendation that the filter permeability should be above 4 × 10−11 m2 to direct the airflow for effectiveness against virus particles; otherwise, low filter permeabilities cause the unfiltered air to flow preferentially through the leak gaps between the mask and the headform. Different mask filters with microstructural and geometry data from the literature are assessed via filtration simulations for breathability and filtration efficiency. The results demonstrate that a surgical mask of 25% porosity, pore size of 150 µm and permeability of 4.4 × 10−11 m2 can achieve 100% minimum efficiency while demonstrating high breathability, complying with the criteria of FFP3, N95, and surgical Class II and IIR masks. Selected cotton and synthetic cloths as well as electrospun fiber layers are predicted to comply with FFP2, N95, and surgical mask Class II and IIR standards. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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