Investigation of the characteristics of particulate flows through fibrous filters using the lattice Boltzmann method--颗粒学报PARTICUOLOGY

Babaie Rabiee, M., Talebi, S., Abouali, O., & Izadpanah, E. (2015). Investigation of the characteristics of particulate flows through fibrous filters using the lattice Boltzmann method. Particuology, 21, 90-98. https://doi.org/10.1016/j.partic.2014.11.010

Investigation of the characteristics of particulate flows through fibrous filters using the lattice Boltzmann method

Marzie Babaie Rabiee^a *, Shahram Talebi ^a, Omid Abouali ^b, Ehsan Izadpanah ^c

a Department of Mechanical Engineering, Yazd University, Yazd, Iran
b Department of Mechanical Engineering, Shiraz University, Shiraz, Iran
c Department of Mechanical Engineering, Persian Gulf University, Bushehr, Iran

10.1016/j.partic.2014.11.010

Volume 21, August 2015, Pages 90-98

Received 22 July 2014, Revised 24 October 2014, Accepted 9 November 2014, Available online 11 March 2015, Version of Record 6 June 2015.

E-mail: mbrabiee@stu.yazd.ac.ir; mbrabiee@gmail.com

Highlights

• The lattice Boltzmann method was employed to understand the mechanism of fibrous filters.

• Results of two regular arrangements of fibers and a random arrangement were compared.

• Several particle sizes and densities were considered.

• Effects of pertinent parameters on the pressure drop and capture efficiency were studied.

Abstract

A fibrous filter is one of the most common systems used to separate suspended particles from air. Two important factors (i.e., the pressure drop and capture efficiency) are usually used to evaluate the performance of this type of filter. This study considers three two-dimensional arrangements of fibers (parallel, staggered, and random) to geometrically model fibrous media. The lattice Boltzmann method is employed to numerically simulate fluid flow through the filter. The Lagrangian form of the equation of motion of a particle is numerically solved to track the path of each particle in the flow field, where a one-way interaction between the fluid and particles is considered. The effects of pertinent parameters such as the fiber arrangement, solid volume fraction, particle-to-fiber diameter ratio, particle-to-fluid density ratio, Reynolds number, Stokes number, and size of the fibrous medium on the pressure drop and capture efficiency are studied. The obtained results are compared with existing empirical and theoretical findings and discussed.

Graphical abstract

Keywords

Fibrous filter; Pressure drop factor; Capture efficiency; Lattice Boltzmann method; Random geometry; Ordered geometry

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