黏性颗粒在聚偏氟乙烯纤维膜内部沉积特性数值模拟

doi:10.19398/j.att.202203033

现代纺织技术 ›› 2022, Vol. 30 ›› Issue (5): 42-51.DOI: 10.19398/j.att.202203033

• 特约专栏:图像处理与数值模拟 • 上一篇下一篇

黏性颗粒在聚偏氟乙烯纤维膜内部沉积特性数值模拟

诸文旎¹, 刘倩倩¹, JAMSHAID Hafsa², 李莉³, 祝国成¹

1.浙江理工大学纺织科学与工程学院(国际丝绸学院), 杭州 310018;
2.Department of Knitting, National Textile University, Faisalabad 37610, Pakistan;
3.香港理工大学纺织与服装学院, 香港 999077

收稿日期:2022-03-18 出版日期:2022-09-10 网络出版日期:2022-09-19
通讯作者:祝国成,E-mail:zgc100100@hotmail.com
作者简介:诸文旎(1997-),女,浙江宁波人,硕士研究生,主要从事非织造纤维过滤材料方面的研究。
基金资助:
国家自然科学基金项目(51803182)

Numerical simulation of deposition characteristics of viscous particles on the surface of polyvinylidene fluoride membrane

ZHU Wenni¹, LIU Qianqian¹, JAMSHAID Hafsa², LI Li³, ZHU Guocheng¹

1. College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou 310018, China;
2. Department of Knitting, National Textile University, Faisalabad 37610, Pakistan;
3. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hongkong 999077, China

Received:2022-03-18 Published:2022-09-10 Online:2022-09-19

摘要/Abstract

摘要： 为了探究黏性颗粒在纤维过滤介质上的沉积特性,通过随机算法建立聚偏氟乙烯纤维膜的三维模型,并采用离散单元法进行了纤维膜内部的气固流动模拟,引入JKR颗粒接触模型,研究了颗粒表面能与碰撞恢复系数对黏性颗粒的运动与沉积特性影响,获得了黏性颗粒在纤维表面沉积的最佳表面能和碰撞恢复系数,并在此基础上研究了粒径2～7 μm黏性颗粒的沉积与受力情况。结果表明:颗粒表面能、恢复系数与粒径均为影响黏性颗粒沉积特性的重要因素,表面能的减小,恢复系数或粒径的增大,能够使捕集效率增大,颗粒在纤维表面更易形成稳定的沉积与团聚形态。

关键词: 黏性颗粒, 气-固两相流, 数值模拟, CFD, 离散单元法

Abstract: To explore the deposition characteristics of viscous particles on fibrous filters, a 3D model of PVDF membrane was established by a stochastic algorithm, and the discrete element method was adopted to simulate the gas-solid flow in the fiber membrane. The JKR particle contact model was introduced to investigate the effects of particle surface energy and inter-particle collision recovery coefficient on the movement and deposition characteristics of viscous particles, the best surface energy and collision recovery coefficient for viscous particles deposited on the surface of fiber were obtained. Then, the deposition of viscous particles with a particle size of 2-7 μm was simulated. The results indicate that the particle surface energy, restitution coefficient and particle size are all significant elements influencing the deposition characteristics of viscous particles. The decrease of surface energy and the increase of restitution coefficient or particle size can increase the capture efficiency. The particles are more likely to form stable deposition and agglomeration forms on the fiber surface.

Key words: viscous particles, gas-solid two-phase flow, numerical simulation, CFD, discrete element method

中图分类号:

TS151

诸文旎, 刘倩倩, JAMSHAID Hafsa, 李莉, 祝国成. 黏性颗粒在聚偏氟乙烯纤维膜内部沉积特性数值模拟[J]. 现代纺织技术, 2022, 30(5): 42-51.

ZHU Wenni, LIU Qianqian, JAMSHAID Hafsa, LI Li, ZHU Guocheng. Numerical simulation of deposition characteristics of viscous particles on the surface of polyvinylidene fluoride membrane[J]. Advanced Textile Technology, 2022, 30(5): 42-51.

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黏性颗粒在聚偏氟乙烯纤维膜内部沉积特性数值模拟

Numerical simulation of deposition characteristics of viscous particles on the surface of polyvinylidene fluoride membrane

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