Modeling electrospun fibrous structures with embedded spacer particles: Application to aerosol filtration

Yousefi, S.H.; Tafreshi, H. Vahedi

doi:10.1016/j.seppur.2019.116184

Cited by 25 publications

(11 citation statements)

References 41 publications

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“…The SFE model is a well-known analytical tool that has been traditionally prevalent in literature which may be used to estimate the total filtration efficiency of filter media based on a calculated particle capture efficiency of a single, isolated fiber positioned perpendicular to the direction of flow [8,27,28]. Yousefi and Tafreshi in 2020 demonstrated the use of the SFE model to predict the filtration efficiency, flow resistance, and FOM of digital twin electrospun filter media embedded with spacer particles [30]. Using their method as a guide, the SFE model can be applied to predict the filtration efficiency, flow resistance, and FOM for our digital twin filter.…”

Section: Discussion: Analytical Modeling Of Digital Twin Filter Geome...mentioning

confidence: 99%

“…In 2016, Karakoc et al modeled composite structure fiber networks as planar projections and intersections of rectangular cross-section shaped fibers [29]. Finally, in 2019 Yousefi and Tafreshi made use of Python scripting and C++ programming to replicate electrospun fiber materials using Kelvin-Voight method of representing fibers as a series of springs and dampers [30,31]. The current effort presented in this work is intended to complement these accomplishments by offering a simple methodology to produce digital fibrous geometry.…”

Section: Literature Review: Virtual Three-dimensional Geometric Modelsmentioning

confidence: 99%

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Digital Twin Geometry for Fibrous Air Filtration Media

Beckman

Berry

Cho

et al. 2021

Fibers

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Computational modeling of air filtration is possible by replicating nonwoven nanofibrous meltblown or electrospun filter media with digital representative geometry. This article presents a methodology to create and modify randomly generated fiber geometry intended as a digital twin replica of fibrous filtration media. Digital twin replicas of meltblown and electrospun filter media are created using Python scripting and Ansys SpaceClaim. The effect of fiber stiffness, represented by a fiber relaxation slope, is analyzed in relation to resulting filter solid volume fraction and thickness. Contemporary air filtration media may also be effectively modeled analytically and tested experimentally in order to yield valuable information on critical characteristics, such as overall resistance to airflow and particle capture efficiency. An application of the Single Fiber Efficiency model is incorporated in this work to illustrate the estimation of performance for the generated media with an analytical model. The resulting digital twin fibrous geometry compares well with SEM imagery of fibrous filter materials. This article concludes by suggesting adaptation of the methodology to replicate digital twins of other nonwoven fiber mesh applications for computational modeling, such as fiber reinforced additive manufacturing and composite materials.

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Section: Discussion: Analytical Modeling Of Digital Twin Filter Geome...mentioning

confidence: 99%

Section: Literature Review: Virtual Three-dimensional Geometric Modelsmentioning

confidence: 99%

Digital Twin Geometry for Fibrous Air Filtration Media

Beckman

Berry

Cho

et al. 2021

Fibers

View full text Add to dashboard Cite

show abstract

“…The formation of PCL filaments was simulated and good agreement between the predicted and measured fiber diameters were observed. The effects of spacer particles with different diameters or basis weights on the thickness and solid volume fraction of spacer‐embedded fibrous media were investigated 15 . According to their results, the addition of separator particles to a fibrous filter reduced the collection efficiency and pressure drop, which resulted in filters with better quality factor.…”

Section: Introductionmentioning

confidence: 99%

“…The effects of spacer particles with different diameters or basis weights on the thickness and solid volume fraction of spacer-embedded fibrous media were investigated. 15 According to their results, the addition of separator particles to a fibrous filter reduced the collection efficiency and pressure drop, which resulted in filters with better quality factor. The effect of electrospinning processing parameters (flow rate, electric field, concentration, and time of electrospinning) on the morphological properties of the electro spun nano-fibrous web was studied and the web was tested for its air permeability and filtration efficiency against aerosol particles.…”

mentioning

confidence: 99%

Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Saleh

Demir

Özay

et al. 2021

J of Applied Polymer Sci

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In this study, a novel basalt embedded fiber membranes was prepared by the electrospinning method. The effects of the feed rate, voltage, tip to collector distance, and the basalt content on the prepared composite fiber membranes were investigated and optimized using the response surface method. Four models were built to compare the fibers in terms of deionized water flux (DWF), activated sludge flux, chemical oxygen demand (COD) removal, and porosity of fiber membranes. All the developed models were significant and adequately precise. The maximum flux of DWF was obtained when the voltage was 17.25 kV, the tip to collector distance of 19 cm, and a basalt content in polymer of 1.25%. COD removal decreased at higher voltage values as the feed rate increased. The porosity, pore size, and the contact angle values decreased for basalt embedded fiber membrane. The increases in the basalt percentage in polymer increased the hydrophilicity of the fiber. The flux decline for the basalt embedded fiber membrane was compared with the pristine fiber membrane. The permeate fluxes of pristine and basalt embedded fiber membranes were 42.3 and 59.6 L/m 2 /h, respectively. The biofouling performances of pristine and basalt embedded fiber membranes were also examined. Irreversible fouling decreased from 42.9% to 8.0%, and reversible fouling increased from 56.5% to 91.1% after modification of the membrane with basalt powder. Scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX) analysis showed that basalt powder was successfully embedded into polyether sulfone polymer.

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“…Currently, numerical simulations [18][19][20] are an effective and widely used tool to analyze among others thermal processes occurring in clothing, phenomena in porous materials [21,22] as well as filtration processes occurring in fibrous materials [23][24][25]. Moreover, these tools use models of real clothing and numerical analysis of physical phenomena to predict their protective properties.…”

Section: Introductionmentioning

confidence: 99%

Modeling of thermal performance of multilayer protective clothing exposed to radiant heat

2020

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Studies presented in this paper concern wide issue of thermal comfort of protective clothing. The Computer Aided Design (CAD) software tools to analyze thermal insulation of multilayer textile assembly used in thermal protective clothing were applied. First, 3D geometry and morphology of a real textile assembly was modeled. In the designed model different scales of resolution were used for individual layers, ranging from a homogenized nonwoven fabrics model to mapping the geometry of yarns in woven fabrics model. Next, the finite volume method to estimate thermal insulation properties of this assembly, when exposed to heat radiation, was used. Finally, the simulation results were verified experimentally using method described in EN ISO 6942. On the basis of both simulation and experimental results obtained for the multilayer textile assembly, protective clothing parameters directly affecting the ability to protect against heat, were determined. Correlating simulated and experimental values of these parameters were obtained, which may indicate that applied software can be an effective tool in analyzing thermal properties of newly designed multilayer functional clothing.

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Modeling electrospun fibrous structures with embedded spacer particles: Application to aerosol filtration

Cited by 25 publications

References 41 publications

Digital Twin Geometry for Fibrous Air Filtration Media

Digital Twin Geometry for Fibrous Air Filtration Media

Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Modeling of thermal performance of multilayer protective clothing exposed to radiant heat

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