Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (09): 76-81.doi: 10.13475/j.fzxb.20210705406

• Fiber Materials • Previous Articles     Next Articles

Simulation analysis of filtration characteristics of fiber materials based on random algorithm

ZHU Wenni1, XU Runnan1, HU Diefei1, YAO Juming2,3,4, MILITKY Jiri5, KREMENAKOVA Dana5, ZHU Guocheng1,3()   

  1. 1. College of Textiles Science and Engineering(International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    3. Zhejiang-Czech Joint Laboratory of Advanced Fiber Materials, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    4. School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315201, China
    5. Faculty of Textile Engineering, Technical University of Liberec, Liberec 46117, The Czech Republic
  • Received:2021-07-16 Revised:2022-03-09 Online:2022-09-15 Published:2022-09-26
  • Contact: ZHU Guocheng E-mail:zgc100100@hotmail.com

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Abstract:

In order to understand flow field evolution of fiber-based air filter, a three-dimensional model, integrated filtration efficiency and particle flow path, was established based on the random algorithm fiber air filter material. The computational hydro dynamics following the Euler-Lagrange discrete phase model was studied in gas-solid flow characteristics based on the Reynolds similarity criterion in micron fiber medium. The results show that the change in inlet velocity has a significant effect on the flow field pressure and velocity field distribution. With the increase in inlet velocity, the blocked area increases, and high-speed flow and velocity vortices are more likely to be formed in the flow field voids, and the overall velocity difference increases at the same time. The pressure loss is positively correlated with the inlet velocity. The filtration efficiency of the fiber model is relatively stable for particles with average particle size of 8-18 mm, which is 80.4%-84%, and the relationship between filtration efficiency and particle size is close to direct proportion when the inlet velocity is 2 m/s.

Key words: air filter, numerical simulation, similarity criterion, filtration characteristic, discrete phase model, fiber material

CLC Number: 

  • TS151

Fig.1

Fiber assembly model"

Fig.2

Meshing"

Fig.3

Boundary conditions"

Fig.4

Velocity distribution of flow field under different inlet velocities"

Fig.5

Pressure distribution of flow field under different inlet velocities"

Fig.6

Pressure drop of fiber assembly model"

Fig.7

Filtration efficiency of fiber assembly model for particulate matter with different particle sizes"

Fig.8

Particle trajectory tracking chart"

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