{"title":"椭圆磁铁磁性空气过滤器的影响因素研究","authors":"Yulin Zhu, Xiaofeng Li","doi":"10.1007/s11270-025-08611-w","DOIUrl":null,"url":null,"abstract":"<div><p>Magnetic filters are widely applied in subway air purification, yet existing research predominantly focuses on cylindrical magnets and lacks simple empirical formulas to describe filtration efficiency and resistance. In this paper, a magnetic filter model with elliptic magnets is established. Based on this model, a two-dimensional simulation was performed. The factors affecting the filtration efficiency and the filtration resistance are investigated: magnet shape factor, inlet airflow velocity, magnetic field strength, blockage rate and particle diameter. Among them, the filtration efficiency of the magnetic filter increases first and then decreases with the increase of the magnet shape factor, and the resistance decreases first and then increases with the increase of the magnet shape factor, that is, there exists an optimal shape factor respectively, which can maximize the filtration efficiency or minimize the resistance. The best shape factor is influenced by other factors. Finally, the empirical formulas of the filter efficiency, filter resistance, the best shape factor are given, which can be used to select the magnet shape, calculate the filter efficiency and filter resistance in practical magnetic filter design, and has a certain guiding role in the manufacture and optimization of magnetic filters.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 14","pages":""},"PeriodicalIF":3.0000,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study of the Influencing Factors of Magnetic Air Filters with Elliptic Magnets\",\"authors\":\"Yulin Zhu, Xiaofeng Li\",\"doi\":\"10.1007/s11270-025-08611-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Magnetic filters are widely applied in subway air purification, yet existing research predominantly focuses on cylindrical magnets and lacks simple empirical formulas to describe filtration efficiency and resistance. In this paper, a magnetic filter model with elliptic magnets is established. Based on this model, a two-dimensional simulation was performed. The factors affecting the filtration efficiency and the filtration resistance are investigated: magnet shape factor, inlet airflow velocity, magnetic field strength, blockage rate and particle diameter. Among them, the filtration efficiency of the magnetic filter increases first and then decreases with the increase of the magnet shape factor, and the resistance decreases first and then increases with the increase of the magnet shape factor, that is, there exists an optimal shape factor respectively, which can maximize the filtration efficiency or minimize the resistance. The best shape factor is influenced by other factors. Finally, the empirical formulas of the filter efficiency, filter resistance, the best shape factor are given, which can be used to select the magnet shape, calculate the filter efficiency and filter resistance in practical magnetic filter design, and has a certain guiding role in the manufacture and optimization of magnetic filters.</p></div>\",\"PeriodicalId\":808,\"journal\":{\"name\":\"Water, Air, & Soil Pollution\",\"volume\":\"236 14\",\"pages\":\"\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2025-10-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water, Air, & Soil Pollution\",\"FirstCategoryId\":\"6\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11270-025-08611-w\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water, Air, & Soil Pollution","FirstCategoryId":"6","ListUrlMain":"https://link.springer.com/article/10.1007/s11270-025-08611-w","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Study of the Influencing Factors of Magnetic Air Filters with Elliptic Magnets
Magnetic filters are widely applied in subway air purification, yet existing research predominantly focuses on cylindrical magnets and lacks simple empirical formulas to describe filtration efficiency and resistance. In this paper, a magnetic filter model with elliptic magnets is established. Based on this model, a two-dimensional simulation was performed. The factors affecting the filtration efficiency and the filtration resistance are investigated: magnet shape factor, inlet airflow velocity, magnetic field strength, blockage rate and particle diameter. Among them, the filtration efficiency of the magnetic filter increases first and then decreases with the increase of the magnet shape factor, and the resistance decreases first and then increases with the increase of the magnet shape factor, that is, there exists an optimal shape factor respectively, which can maximize the filtration efficiency or minimize the resistance. The best shape factor is influenced by other factors. Finally, the empirical formulas of the filter efficiency, filter resistance, the best shape factor are given, which can be used to select the magnet shape, calculate the filter efficiency and filter resistance in practical magnetic filter design, and has a certain guiding role in the manufacture and optimization of magnetic filters.
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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