中国塑料2025，Vol.39Issue(6)：59-65,7.DOI:10.19491/j.issn.1001-9278.2025.06.012
幂律流体在单螺杆中的流场特性仿真分析
Simulation analysis of flow field characteristics of power law fluid in single screw
宋宇谟 1董立佳 1李国胜 1王金霞1
作者信息
- 1. 大连橡胶塑料机械有限公司,辽宁 大连 116000
- 折叠
摘要
Abstract
This study focuses on power-law fluid dynamics within a three-dimensional single-screw model.Numerical methods were employed to analyze the flow behavior of power-law fluids,and the ANSYS Polyflow software was uti-lized to simulate their flow patterns in the 3D screw geometry.Dimensionless parameters were adopted to ensure the gen-eralizability of the results.First,the relationship between screw throughput and pressure gradient under varying power-law indices was calculated to validate the simulation method's accuracy.Subsequently,flow field characteristics,includ-ing velocity,shear rate,and viscosity profiles along the depth of the screw channel,were extracted and analyzed,with emphasis on their variations under different power-law indices and pressure gradients.The study concluded with key find-ings on power-law fluid flow dynamics.Notably,as the power-law index decreases,the pressure-driven flow field of the fluid intensifies,leading to diminished screw conveying capacity.This is reflected in the viscosity field:reduced viscosity near the upper and lower surfaces of the screw channel weakens the response of fluid to screw-induced propulsion,ulti-mately decreasing conveying efficiency and potentially inducing reverse flow.关键词
幂律流体/单螺杆/熔体输送/压力流/ANSYS PolyflowKey words
power law fluid/single screw/melt transport/pressure flow/ANSYS polyflow分类
化学工程引用本文复制引用
宋宇谟,董立佳,李国胜,王金霞..幂律流体在单螺杆中的流场特性仿真分析[J].中国塑料,2025,39(6):59-65,7.
