Efficiency of Fibrous Filters with Rectangular Fibers

Fardi, Behzad; Liu, Benjamin Y. H.

doi:10.1080/02786829208959559

Cited by 32 publications

(17 citation statements)

References 2 publications

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“…Most of these papers are complex computationally, limiting their utility for real filter problems. In addition, only Fardi and Liu (1992b) provided expressions that are useful for predicting filtration efficiency.…”

Section: Introductionmentioning

confidence: 99%

Single-Fiber Interception Efficiency for Elliptical Fibers

Raynor

2008

Aerosol Science and Technology

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Synthetic fibers with non-circular cross-sections are used in air filters. These fibers may offer performance advantages over traditional fibers with circular cross sections because they have more surface per unit volume of fiber upon which particles can collect. Starting with a solution for the velocity field around fibers with elliptical cross-sections, expressions for predicting the single-fiber efficiency for particle collection by the interception mechanism were developed for elliptical fibers. The interception efficiency predictions depend on filter solidity, fiber properties such as size, aspect ratio, and orientation of the cross section relative to the incoming flow, and particle diameter. The expressions demonstrate that single fiber interception efficiency for elliptical fibers generally increases with increasing particle diameter, increasing solidity, increasing aspect ratio, and as the major axis of the ellipse becomes more perpendicular to the incoming air flow.

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Section: Introductionmentioning

confidence: 99%

Single-Fiber Interception Efficiency for Elliptical Fibers

Raynor

2008

Aerosol Science and Technology

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“…Various ow models have been proposed (Lamb 1932;Happel 1959;Kuwabara 1959;Natanson and Ushakovich 1961;Natanson 1962;Velichko and Radushkevich 1964;Kirsch and Fuchs 1968b;Spielman and Goren 1968). More realistic ow elds have recently been obtained by solving the Navier-Stokes equations numerically (Fardi and Liu 1992b;Liu and Wang 1996). The underlying assumption in the above solutions is that the presence of the particles in the ow does not disturb the ow eld.…”

Section: Mathematical Formulationsmentioning

confidence: 99%

The Filtration of Fibrous Aerosols

Asgharian

Cheng

2002

Aerosol Science and Technology

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“…Here, we quote the studies of Brown (1984), Fardi and Liu (1992a), Wang (1996), Ouyang and Liu (1998), and Dhaniyala (1999) for flow field and pressure drop, and Fardi and Liu (1992b) for capture efficiencies due to Brownian diffusion and interception, Zhu et al (2000) for capture efficiency due to inertial impaction, and Adamiak (1999), Cao et al (2004) and Cheung et al (2005) for the filtration performance in an electric field. Hosseini and Tafreshi (2011) investigated the effects of fibers' cross-sectional shape on the performance of a nanofiber filter (in the slip flow regime) and a microfiber filter (in the no-slip flow regime).…”

Section: Introductionmentioning

confidence: 99%

Simulating and Modeling Particulate Removal Processes by Elliptical Fibers

Wang

Zheng

2013

Aerosol Science and Technology

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A lattice Boltzmann-cellular automata (LB-CA) probabilistic model for two-phase flows was used to simulate the particle capture process of elliptical fiber. The pressure drop and capture efficiency due to various capture mechanisms (Brownian diffusion, interception, and inertial impaction) were investigated. It is found that the diffusional capture efficiency of the elliptical fiber is greater than that of the circular fiber because of its larger capture area, which is proportional to the aspect ratio. When the interception or inertial impaction is dominated, aspect ratio, orientation angle, and the ratio of particle diameter to the fiber diameter affect the capture efficiency of the elliptical fiber, which is usually higher than that of the circular fiber except that the major axis is parallel to the incoming flow. The correction factors for the pressure drop and capture efficiency of elliptical fiber from those of circular fiber were attained through the Levenberg-Marquardt algorithm, which is used to fit some well-organized LB-CA simulations. These empirical correction factors can combine the classical models for circular fiber to calculate the pressure drop and capture efficiency for elliptical fiber in a simple way. Finally, the quality factors of elliptical fibers as a function of the aspect ratio and orientation angle were investigated, which is conducive to optimization configuration of elliptical fiber in different operation conditions.

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Efficiency of Fibrous Filters with Rectangular Fibers

Cited by 32 publications

References 2 publications

Single-Fiber Interception Efficiency for Elliptical Fibers

Single-Fiber Interception Efficiency for Elliptical Fibers

The Filtration of Fibrous Aerosols

Simulating and Modeling Particulate Removal Processes by Elliptical Fibers

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