中国塑料 ›› 2021, Vol. 35 ›› Issue (7): 74-79.DOI: 10.19491/j.issn.1001-9278.2021.07.013

• 加工与应用 • 上一篇    下一篇

微纳层叠聚丙烯腈凝胶流动特性的数值模拟研究

盛天阳1, 谭晶1,2, 张政和1, 高晓东1, 于景超1, 程礼盛1,2(), 杨卫民1,2()   

  1. 1.北京化工大学机电工程学院,北京 100029
    2.有机无机复合材料国家重点实验室,北京 100029
  • 收稿日期:2020-01-30 出版日期:2021-07-26 发布日期:2021-07-21
  • 基金资助:
    国家重点研发计划(2016YFB302000);国家自然科学基金面上项目(52073012)

Numerical Simulation of Polyacrylonitrile Gel Flow Characteristics in Laminated Runner

SHENG Tianyang1, TAN Jing1,2, ZHANG Zhenghe1, GAO Xiaodong1, YU Jingchao1, CHENG Lisheng1,2(), YANG Weimin1,2()   

  1. 1.School of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China
    2.State Key Laboratory of Organic?Inorganic Composites,Beijing 100029,China
  • Received:2020-01-30 Online:2021-07-26 Published:2021-07-21
  • Contact: CHENG Lisheng,YANG Weimin E-mail:chengls@mail.buct.edu.cn;yangwm@ mail.buct.edu.cn

摘要:

建立了层叠流道的三维模型和有限元网格模型,根据流变测试数据,采用Polymat对物料的黏度模型参数进行拟合,并利用Polyflow软件对聚丙烯腈(PAN)凝胶在层叠流道内的三维等温流动过程进行了数值模拟分析。研究发现,当入口流量增大时,层叠流道出口速度的不均匀性增加;沿流动方向流道内压力逐渐降低,并在出口处降低至同一最低值;流道进出口压力差与入口流量大小具有正相关性;在流道的中心截面上剪切速率分布均匀,波动较小。

关键词: 聚丙烯腈, 原丝, 凝胶, 微纳层叠, Polyflow软件, 数值模拟

Abstract:

A 3D and finite element mesh model of flow channel was established, and then Polymat was used to fit the parameters of the material according to the rheological test results. The Polyflow software was used to analyze the numerical simulation of the 3D isothermal flow process of polyacrylonitrile gel in a channel. The results indicated that the outlet velocity of the channel was more uneven as the inlet flow increased. The pressure in the channel gradually decreased along the flow direction and decreases down to the same minimum value at the outlet. The inlet and outlet pressure difference of the channel has a positive correlation with the inlet flow rate. The shear rate was uniformly distributed on the central section of the channel under a small fluctuation range.

Key words: polyacrylonitrile, precursor, gel, microlayer co?extrusion, Polyflow software, numerical simulation

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