1
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Improved design of metal fiber filter materials: Experiment and theory. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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2
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Li L, Zhou Y, Li X, Hou X, Xu Y, Sun Z, Gu H, Ding R. Three-dimensional numerical simulation and structural optimization of filtration performance of pleated cylindrical metal fiber filter. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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3
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Teng G, Shi G, Zhu J, Qi J. A numerical simulation method for pressure drop and normal air velocity of pleated filters during dust loading. PLoS One 2023; 18:e0282026. [PMID: 36809282 PMCID: PMC9943013 DOI: 10.1371/journal.pone.0282026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 02/07/2023] [Indexed: 02/23/2023] Open
Abstract
Pressure drop is an important indicator that affects the filtration performance of the pleated filter, and the deposition of dust particles within the pleats is crucial to the evolution of the pressure drop. In this study, the pressure drop during PM10 loading process was investigated for a series of V-shaped and U-shaped filters with a pleat height of 20 mm and different pleat ratios (the ratio of pleat height to pleat width: α = 0.71-3.57). In the numerical simulations, numerical models suitable for different pleated geometries were obtained through experimental verification on the local air velocity. Then, assuming that the dust cake thickness is proportional to the normal air velocity of the filters, the variation of the pressure drop with the dust deposition is derived by means of successive numerical simulations. This simulation method saved a significant amount of CPU time required for the growth of dust cake. It was found that the relative average deviations between experimental and simulated pressure drops were 3.12% and 1.19% for V-shaped and U-shaped filters, respectively. Furthermore, it was found that under the same pleat ratio and the mass of dust deposition per unit area, both the pressure drop and unevenness of normal air velocity of the U-shaped filter were lower than the V-shaped filter. Therefore, the U-shaped filter is recommended due to its better filtration performance.
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Affiliation(s)
- Guangping Teng
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, China
- School of Safety and Management Engineering, Hunan Institute of Technology, Hengyang, China
| | - Guoqing Shi
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, China
- State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China
- * E-mail:
| | - Jintuo Zhu
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, China
| | - Jiamin Qi
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, China
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4
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Teng G, Shi G, Zhu J. Influence of pleated geometry on the pressure drop of filters during dust loading process: experimental and modelling study. Sci Rep 2022; 12:20331. [PMID: 36434124 PMCID: PMC9700835 DOI: 10.1038/s41598-022-24838-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022] Open
Abstract
In this study, a pressure drop model was developed through numerical simulation and experimentation for optimizing the design of the pleated structure of the filter media to extend the service life of the filter and reduce the ventilation energy consumption. The effect of the Stokes number on the dust deposition on the pleated filter media was revealed through numerical simulation. On this basis, a pressure drop model during dust loading was developed. The model suggests that under the same mass of dust deposition per unit area (W), the greater the pleat ratio (α), the greater the dust cake thickness and the effective filtration velocity in the effective filtration area. In addition, for V-shaped and U-shaped filters, the relative mean deviations between experimental and modeling total pressure drops are 3.68% and 4.82%, respectively. In other words, the proposed model accurately predicts pressure drop during dust loading. Furthermore, under the same α and [Formula: see text], the total pressure drop of the U-shaped filter is lower than that of the V-shaped filter, demonstrating the superior filtration performance of the U-shaped filter.
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Affiliation(s)
- Guangping Teng
- grid.411510.00000 0000 9030 231XSchool of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116 China ,grid.464340.10000 0004 1757 596XSchool of Safety and Management Engineering, Hunan Institute of Technology, Hengyang, 421002 China
| | - Guoqing Shi
- grid.411510.00000 0000 9030 231XSchool of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116 China ,grid.411510.00000 0000 9030 231XState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, 221116 China
| | - Jintuo Zhu
- grid.411510.00000 0000 9030 231XSchool of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116 China
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5
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Research on the filtration performance of pleated filters with rectangular and triangular structures through developed CFD code. PROGRESS IN NUCLEAR ENERGY 2022. [DOI: 10.1016/j.pnucene.2022.104413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Kim YL, Kwon MS, Lee MH. Optimized pleat geometry at specific pleat height in pleated filters for air purification. INDOOR AIR 2022; 32:e13135. [PMID: 36305062 DOI: 10.1111/ina.13135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 09/06/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
The performance of an air purifier is determined by its clean air delivery rate (CADR), expressed as the product of the air flowrate and filter collection efficiency. A high CADR in a commercial air purifier is achieved using a pleated air filter with high filtration performance at a given air flowrate. However, obtaining this high filtration performance depends on the knowledge of the manufacturer, including the optimal pleating design, which remains uncertain to date. In this study, test pleated filters were prepared by folding a flat electrostatically-charged E12 filter medium to obtain different pleating geometries. The proper pleat geometry of the pleated filter, which has a minimum pressure drop at a fixed air flowrate, was dependent on the pleat length (PL ) and pleating ratio (α = pleat height/pleat width), wherein as the PL increases, the α range required to achieve a minimum pressure drop similarly increases. Based on the filter quality factor (qF ), the optimal pleat geometry of a pleated filter was between α values of 6-8, irrespective of the PL . Although both PL and α have certain influences on the qF , α has a greater influence on the pleated filter with no dead zone.
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Affiliation(s)
- Ye-Lin Kim
- Department of Environmental Engineering, Kangwon National University, Chuncheon, Republic of Korea
| | - Min-Seon Kwon
- Department of Environmental Engineering, Kangwon National University, Chuncheon, Republic of Korea
| | - Myong-Hwa Lee
- Department of Environmental Engineering, Kangwon National University, Chuncheon, Republic of Korea
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7
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Zhang X, Liu J. Operating resistance prediction of non-flat HEPA filters. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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Alilou Y, Bardin‐Monnier N, Thomas D, Bourrous S, Lemaître P, Gélain T. Development of a semi‐analytical model to predict the pressure drop of clean pleated high efficiency particulate air filters. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Youssef Alilou
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
- Université de Lorraine, CNRS, LRGP Nancy France
| | | | | | - Soleiman Bourrous
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
| | - Pascal Lemaître
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
| | - Thomas Gélain
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
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9
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Numerical and Experimental Investigation of Three-Dimensional Flow in Combined Protective Canister Filters. FLUIDS 2022. [DOI: 10.3390/fluids7050171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This work deals with the numerical and experimental investigation of flow in the protective filters which combine fibrous pleats and the absorbent cartridge. The flow through the complete 3D geometry of all parts of the filters, including complex geometry of the pleats, is numerically modeled using high-quality computational grids. The sorbent filling, textile dividers as well as the material of filtration pleats are modeled as the porous media with the coefficients of the quadratic Forchheimer equation derived from the experiments in the laboratory located at the SIGMA Research and Development Institute. A comprehensive CFD analysis has been carried out using the ANSYS CFX package with the SST turbulence model, which combines advantages of both the high- and the low-Reynolds number turbulence models. The fully parametric description of the pleats enables the generation of high-quality structured computational grids for a wide range of pleat heights and widths and to use numerical shape optimization process. The numerical simulations show very good agreement of calculated and measured pressure drop for all variants of the complex geometry of the combined filter. To simulate a real application of the protective filter, the unsteady simulations which follow the human breathing pattern have been performed with the flow rate corresponding to the increased human activity.
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10
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Alilou Y, Bourrous S, Gélain T, Bardin‐Monnier N, Thomas D. Airflow characterization within the pleat channel of
HEPA
filters with mini pleats. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Youssef Alilou
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
- Laboratoire Réactions et Génie des Procédés Université de Lorraine, CNRS, LRGP Nancy France
| | - Soleiman Bourrous
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
| | - Thomas Gélain
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN‐RES, SCA Gif‐Sur‐Yvette France
| | | | - Dominique Thomas
- Laboratoire Réactions et Génie des Procédés Université de Lorraine, CNRS, LRGP Nancy France
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11
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Local variations of air velocity in the vicinity of filter pleats in transitional airflow regime – Experimental and numerical approaches. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Experimental and Theoretical Research on Pressure Drop Changes in a Two-Stage Air Filter Used in Tracked Vehicle Engine. SEPARATIONS 2021. [DOI: 10.3390/separations8060071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The effect of mineral dust in the air sucked in by an engine on accelerated component wear and reduction in performance was presented. The necessity to use two-stage air filters (multicyclone-paper insert) for military vehicles was shown. The results showed that placing an air filter in the path of the air entering the engine causes an additional pressure drop (air filter resistance increase), which leads to engine power decrease and increased fuel consumption. An analysis of model filter beds’ pressure drop changes (depending on bed parameters, aerosol flow parameters, and dust content) was carried out. It was revealed that it is very difficult to model changes in pressure drop in filter beds for actual conditions that appear during vehicle operation. The air filter pressure drop measurement results of more than 20 tracked vehicles operating in variable air dust concentration conditions were presented. The forms of selected regression models of the “life curve” type, best suited to the actual changes in air filters pressure drop as a function of the vehicle mileage, were determined. Significant differences were found between the same model values for different units of the tested vehicles. The quality of forecasting pressure drop value by selected functions was assessed by extrapolating them to the value of the next measurement and comparing the forecast and actual value. It was found that for the performed experiment, sufficiently good results of experimental data approximation and forecasting were obtained for a simple linear model.
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Liu X, Zhang X, Liu S, Liu J, Chen Q. Optimization of multi-V filter design for airliner environmental control system using an empirical model. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Kang S, Bock N, Swanson J, Pui DY. Characterization of pleated filter media using particle image velocimetry. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Maddineni AK, Das D, Damodaran RM. Numerical investigation of pressure and flow characteristics of pleated air filter system for automotive engine intake application. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.11.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Feng Z, Pan W, Wang Y, Long Z. Modeling filtration performance of pleated fibrous filters by Eulerian-Markov method. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.09.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Feng Z, Pan W, Zhang H, Cheng X, Long Z, Mo J. Evaluation of the performance of an electrostatic enhanced air filter (EEAF) by a numerical method. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.12.054] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Théron F, Joubert A, Le Coq L. Numerical and experimental investigations of the influence of the pleat geometry on the pressure drop and velocity field of a pleated fibrous filter. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.02.034] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Bourrous S, Bouilloux L, Nerisson P, Thomas D, Appert-Collin JC. Influence of Pleat Deformation on Pressure Drop for a High-Efficiency Particulate Air Filter: A Small-Scale Experimental Approach. JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE 2017. [DOI: 10.1115/1.4034711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
For industrial or domestic applications, the wide range of use of pleated filters makes the understanding of their airflow behavior a major issue for designer and users. In all industrial installations dealing with radioactive matter, the containment of pollutants must be ensured. High-efficiency particulate air (HEPA) filters are used as the last purification stage before the air is rejected in the environment. These filters can be used either alone, in the case of nonsensible installation, or coupled with other filtration devices disposed before it where contamination level could be important. The prediction of their pressure drop is very important in nuclear safety to be able to anticipate any dysfunction or rupture of these devices. It has been observed that geometry of the medium has an influence on the pressure drop of a pleated filter. In the case of HEPA filters, no convincing explanation has been brought to explain their airflow behavior. The pressure drop evolution of the filter during the clogging remains difficult to explain by assuming constant pleat geometry. Some studies show that deformation occurs during the filter use, which could induce an increase of the available volume in the pleat and a reduction of the efficient filtration surface. The increase in computation capacity introduces nowadays the possibility to perform complex simulation, taking into account the effect of fluids on sensible devices. This can be the case for simple structural analysis or for more complex analysis such as vibration induced by gas or fluid flow. It is mostly applied to avoid breaking or deformation of safety devices, and this can also be applied to anticipate the fluid behavior of some special devices such as filters. In classical filtration application, properties of the filter are coupled with particle deposition (e.g., changes in geometry and permeability depend on the thickness of the deposit). The studies concerning mechanical properties of filters are mainly performed for liquid filtration and clean filters. For pleated filters, the complexity of this kind of analysis remains the modification of the link between geometry, pressure drop, mechanical strength, and particle transport and accumulation inside the pleat. As a first approach, it has been chosen to combine an experimental and a numerical approach to improve the understanding of filter behavior. In this paper, the pleat deformation will be investigated using a direct nonintrusive laser measurement performed on a single pleat experiment. The rate of filtration surface lost will be estimated using these data and taken into account to evaluate the pressure drop against the filtration velocity. Results obtained show that the pleat deformation is an important parameter, which influences the geometry of the pleat.
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Affiliation(s)
- S. Bourrous
- Université de Lorraine, LRGP, UMR 7274, Nancy 54001, France
- CNRS, LRGP, UMR 7274, Nancy 54001, France
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA, Gif-sur-Yvette 91192, France e-mail:
| | - L. Bouilloux
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA, Gif-sur-Yvette 91192, France
| | - P. Nerisson
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA, Gif-sur-Yvette 91192, France
| | - D. Thomas
- Université de Lorraine, LRGP, UMR 7274, Nancy 54001, France
- CNRS, LRGP, UMR 7274, Nancy 54001, France
| | - J. C. Appert-Collin
- Université de Lorraine, LRGP, UMR 7274, Nancy 54001, France
- CNRS, LRGP, UMR 7274, Nancy 54001, France
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Saleh A, Tafreshi HV, Pourdeyhimi B. An analytical approach to predict pressure drop and collection efficiency of dust-load pleated filters. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.01.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Meireles M, Prat M, Estachy G. Analytical modeling of steady-state filtration process in an automatic self-cleaning filter. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2015.04.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Combination of Single-Photon Emission and X-Ray Computed Tomography to visualize aerosol deposition in pleated filter. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.02.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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