CFD–DEM simulation of particle deposition characteristics of pleated air filter media based on porous media model--颗粒学报PARTICUOLOGY

Cheng, K., Zhu, J., Qian, F., Cao, B., Lu, J., & Han, Y. (2023). CFD–DEM simulation of particle deposition characteristics of pleated air filter media based on porous media model. Particuology, 72, 37-48. https://doi.org/10.1016/j.partic.2022.02.003

CFD–DEM simulation of particle deposition characteristics of pleated air filter media based on porous media model

Kaiwen Cheng ^a 1, Jingjing Zhu ^a 1, Fuping Qian ^b *, Bowen Cao ^a, Jinli Lu ^a, Yunlong Han ^a

a School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243002, China
b School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China

10.1016/j.partic.2022.02.003

Volume 72, January 2023, Pages 37-48

Received 11 December 2021, Revised 9 February 2022, Accepted 11 February 2022, Available online 26 February 2022, Version of Record 3 May 2022.

E-mail: fpingqian@ahut.edu.cn

Highlights

• CFD–DEM coupling method was applied to macroscopic simulation of pleated air filter media.

• Pleated air filter media was simplified as porous media (porous zone).

• Deposition process of particles in different regions was observed.

• Influence of particles deposition on air distribution and pressure drop was analyzed

Abstract

In this study, the three-dimensional physical model of pleated air filtration media was simplified to porous media model, and the calculation parameters of porous media were obtained based on experimental data. The model of V-shaped pleated air filter media is constructed, the height of the media pleat is 50 mm and the pleat thickness is 4 mm, the pleat angle is 3.7°. The Hertz-Mindlin contact model was modified by Johnson Kendall Roberts (JKR) adhesion contact model. The deposition process of particles in media was simulated based on computational fluid dynamics (CFD) theory and discrete element method (DEM). Results show that the CFD–DEM coupling method can be effectively applied to the macro research of pleated air filter media. The particles will form dust layer and dendrite structure on the fiber surface, and the dust layer will affect the subsequent air flow organization, and the dendrite structure will eventually form a “particle wall”. The formation of the “particle wall” will prevent the particles from moving further in the fluid domain, which makes area of pleated angle become the “low efficiency” part about the particle deposition. Compared with area of pleated angle, the particles are concentrated in the opening area and the middle area of the pleated to agglomerate and deposit.

Graphical abstract

Keywords

Pleated air filter media; CFD–DEM; Air distribution; Deposition characteristics

文章导读