Representative domain size for the simulation of coalescence filtration in nonwoven and foam media

Abishek, S.; King, Andrew; Schuler, Julia; Kasper, Gerhard; Schmid, Hans‐Joachim; Mullins, Benjamin J.

doi:10.1016/j.seppur.2018.06.051

Cited by 17 publications

(4 citation statements)

References 26 publications

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“…256 They concluded that the theoretical prediction and numerical simulation results are higher than the experimental values due to the randomness of fiber orientation. However, Abishek 257 suggested that the minimum computational domain size used in CFD simulation of the particle filtration process will affect the accuracy of the simulation results. For mesh sizes of the order of about 10−100 million cells, the deviation between the expected results and the experimental data is up to ±10%.…”

Section: C Esmentioning

confidence: 99%

Theoretical Model of Single Fiber Efficiency and the Effect of Microstructure on Fibrous Filtration Performance: A Review

Bai

Qian

Fan

et al. 2020

Ind. Eng. Chem. Res.

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Fibrous filters are widely used in manufacturing and separation industries to remove aerosol particles produced in the production process. However, due to the complex internal structure of fibrous filters, there are still some problems to be investigated. In the first part of this review, the different theoretical analyses of the flow field distribution around the fiber is summarized. In a comparison of the various theoretical models of flow fields with the simulation results, the Kuwabara-Happel flow field model has the best applicability. The theoretical models of single fiber filtration by five mechanisms: diffusion, interception, inertial impaction, gravity settling, and electrostatic effects are summarized. One of the other outstanding questions is the effect of fibrous microstructure characteristics on filtration efficiencies, such as the composite layer structure, the heterogeneity of the fibrous filters, and the fiber orientation. Finally, critical gaps in the literature and necessary directions for future investigations are also given.

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Section: C Esmentioning

confidence: 99%

Theoretical Model of Single Fiber Efficiency and the Effect of Microstructure on Fibrous Filtration Performance: A Review

Bai

Qian

Fan

et al. 2020

Ind. Eng. Chem. Res.

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“…In process engineering, gas often carries numerous oil mist droplets as impurities or recyclable materials. These processes include long-distance pipeline transportation of natural gas, gas exploitation of coalbed methane, compressed air filtering, crankcase ventilation, mechanical cutting, and so on. − The droplets generally exist in the form of liquid aerosol, and they have multiple types and many sources. If these droplets cannot be removed promptly, they may result in the wearing of equipment, instrument failure, blocking of pipelines, deteriorated gas quality, faulting or the abnormal halting of compressors, and threats to the health and safety of workers. , Many methods can be used to remove droplets, including gravity settling, centrifugal separation of rotational flow, inertial separation of blades, electrostatic agglomeration, filtering separation, etc. − Coalescence filtration is one of the most effective methods at present for the removal of micro- and even nanodroplets. , Fiber materials are common coalescence filtration media.…”

Section: Introductionmentioning

confidence: 99%

Modification Strategy for High-Performance Coalescing Filters with a Patterned Surface and Its Application to Cartridges

Chen,

Lu,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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Gas–liquid coalescence filters are extensively applied in industrial fields, mainly to separate oil mist droplets that are carried in gases. The traditional wettability treatment on the filter surface can improve the filtration efficiency but usually also increases the pressure drop. In this study, a surface modification method based on tip patterns was proposed. Nonuniform wettability filter surfaces with tip patterns were prepared by combining star-shaped molds and spraying modification to explore the influence of key pattern parameters on the performance of filters. In this way, industrial cartridges were prepared based on the optimal modification parameters and their filtration performance was analyzed and verified. The results showed that liquid collection by the modified filters improved significantly under the combined effect of the wettability driving force and Laplace force produced by the shape gradient, while the steady-state pressure drop decreased by 34.2–47.4% compared to the substrate filter. The modifications facilitated an increase in the effective fiber surface area and strengthened the droplet capture effect by diffusion. When the tip angle was 50°, all of the modified filters achieved the highest droplet filtration efficiency across different droplet size intervals. When there were nine patterns at a 50° tip angle, the modified filters achieved the optimal comprehensive filtration performance, and the steady-state quality factor increased 3.1- and 3.4-fold for submicrometer and micrometer droplets, respectively, compared to the substrate filter. Industrial cartridges were prepared based on the optimal filters. Under different liquid-loading rates, the modified cartridges had significantly higher efficiency and lower resistance compared to the unmodified cartridge. The proposed pattern modification method provides a direction for the design and development of new high-performance coalescence components.

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“…Gervais [7] et al investigated the motion pattern in pleated wave lters under different operating conditions using radiolabeled aerosols and combining single photon emission computed tomography (SPECT) and x-ray computed tomography. The team of Mullins and Azarafza [8][9][10] developed a dynamic pore network model (DPNM) using computational uid dynamics (CFD) holomorphic simulations and advanced interface capture techniques to simulate the lter media ltration process. They found that the liquid channels within the lter media were not exactly parallel to the air ow direction.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of Phobic and Philip Oil Mist Filters Under High Pressure

Wang,

Wu,

Chen

et al. 2024

Korean J. Chem. Eng.

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The aim of this paper is to study the changing law of lter material properties under high pressure conditions, and for this purpose an experimental setup was established to measure the properties of lter materials at a maximum pressure of 5 MPa. The experiments were carried out at a pressure of 1-5 MPa, and the detailed experiments were conducted on the pressure drop, saturation and the liquid distribution pattern of the rst and last layers of the lter material. The experimental results show that the liquid lm on the surface of the lter material becomes progressively thinner with increasing pressure, and the jump pressure drop becomes smaller while the saturation increases. In addition, the results show that with increasing pressure, the surface tension of the droplets decreases and the surface tension of the DEHS decreases from 28.72 mN/m to 25.26 mN/m. The capillary force of lter material B was reduced from 0.20 mN to 0.13 mN, a 35% reduction in capillary force. which changed the distribution of droplets on the bres and enhanced the wettability of the lter material. This discovery is of great signi cance for understanding the variation pattern of lter material performance under high pressure conditions, and provides a basis for the design and manufacture of lter elements for high pressure occasions.

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Representative domain size for the simulation of coalescence filtration in nonwoven and foam media

Cited by 17 publications

References 26 publications

Theoretical Model of Single Fiber Efficiency and the Effect of Microstructure on Fibrous Filtration Performance: A Review

Theoretical Model of Single Fiber Efficiency and the Effect of Microstructure on Fibrous Filtration Performance: A Review

Modification Strategy for High-Performance Coalescing Filters with a Patterned Surface and Its Application to Cartridges

The Behavior of Phobic and Philip Oil Mist Filters Under High Pressure

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